Do you need a full auto bcg for a binary trigger - Toolcraft Logo’d Left Handed 5.

 
Carrier: Titanium. . Do you need a full auto bcg for a binary trigger

Even if I don't add the Binary Trigger, What is the Advantage of a Full Auto BCG vs Standard BCG?. This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR15 upper receivers. No special BCG required. It is wobbly even tho im using the pins it came with The trigger when it does work is very very hard to pull and will only fire 2-3 rounds. The Wide Open Trigger (WOT) is a two-stage, hard-reset trigger for AR-15 platforms chambered in. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical. After 700 rounds, it has dropped down to working (in binary) roughly 75% of the time. Well, Franklin Armory's Binary Trigger simulates full auto. Trigger Lock Spring (J) in place of your factory, full length Trigger Lock Spring (L). My understanding is that the Foster is the better of the two because it is timed to the bolt the same way a full auto is. With patience and knowledge it can be done easily and reliably. Do you need a full auto BCG for a binary trigger? The BFSIII trigger is compatible with guns that take AR-15 triggers. The ATF currently does not consider a binary trigger (or a firearm with a binary trigger installed) to be a machine gun because by law a machine gun is. This full mass carrier is good for almost every rifle purpose. One pull of the trigger equals two shots. May 17, 2020. For close range you can dump 30 rounds in no time at all. 56 Complete Phosphate BCG. Lastly, replace the safety selector and hammer. Thanks! Your choice in BCG won't affect the function of the Fostech as long as it's a full auto BCG. To answer your question about the Receivers being different. Thirdly, when closing your receiver set, you may need to pull pull back on the charging handle slightly. I have a DPMS Oracle AR-15 that I was told I should Up-Grade my bolt carrier group because the standard factory BCG fails quickly. Many of the 516's just have a semi auto bolt carrier. ago I have both, the Franklin BFSIII is a much better option. FRANKLIN ARMORY® FAI™ Binary® Marked Forged Lower Receiver. I was just wondering if it's legal to. Then I suggest you view some comparison videos of the Fostech and Franklin Armory triggers to decide which would meet your needs. The Franklin Armory binary trigger in its natural habitat. 56mm M16 clones to. Without the Binary function you get a safe 1-pound trigger that’s faster than the BGRF. Feb 23, 2022 · An awesome AR-15 needs a great bolt carrier group (BCG). Step 6: Install the trigger pins. We will also discuss the benefits of doing so. Which AR-C1 has one trigger pull of 4. You CAN own FA BCG's and own AR's –– nothing illegal. The Franklin Armory BFSIII 22-C1 trigger is a 3-position trigger designed to enhance your Ruger 10/22 rifle experience. View Product. Then I suggest you view some comparison videos of the Fostech and Franklin Armory triggers to decide which would meet your needs. Back edge to bottom of bolt is pretty simple for the needed sear trip edge distance, since you do have a colt full auto 9mm bolt to measure from the back of bolt to the bottom trip shelf to get the needed dimensions that you need to match with another bolt so the trip ledge is correct from the back of the bolt (mill back, but in most cases. Position one is safe. These are 100% legal and do not turn your AR into a Class III Weapon. Binary triggers are a gimmick that does little other than waste ammo. Another competitor to simulated full auto is the bump fire stocks like Slide Fire. 22 conversion kit or a 308, whereas the Franklin version can used any BCG and can be used with a. 3 Agu 2017. They work by using the recoil of the gun to push the firearm back while you push the firearm forward. If you need the stronger buffer spring, it comes with the trigger; don't adjust things until you install and test the trigger. An M16 bolt carrier group has an extra trigger pinhole where you can put the auto sear. Every gun is going to be a little different, based on barrel length, gas system, buffer, and bolt carrier weight. 3: trigger still held, hammer is pushed back to binary disconnector and gets hooked. Well now there is a new DIY method for an AR-15. Nov 28, 2014. However, by the ATF's definition of machine guns, this is not the case, and binary triggers are legal in most states (more on that later). In semi the trigger pull is very spongy and not all that great. 99 $386. The Franklin works great once you learn the trigger cadence. No special BCG required. This still limits you to AR15’s that use a full auto bolt carrier group. The AR-15 bolt carrier group (BCG) is one of the most important parts of an AR-15 platform. The image below gives a nice breakdown of the parts in a typical BCG. 5 Creedmoor rifle. Additionally, simply adding an M16 BCG to your AR-15 will not give it full auto. So, let’s get started! Ar15 binary trigger DIY. No special BCG required. The difference comes in when using a full auto trigger group. FYI, the “sport” indicates this does not have the ability to cancel the second shot from the selector, you must move the “paddle” in front of the trigger while keeping the trigger depressed, and also lacks a semi auto mode. A tax stamp is a legal requirement in most states. 286K subscribers in the ar15 community. Most AR-15 receivers won't even accept the auto sear if you drilled the hole. 28 Nov 2016. Huh that makes sense. I’m not familiar with the Ratler, but can you adjust the gas at all? How fast does it run without the cash on it? Also, did you ever get one to run in a RDB set up? I. Lastly, replace the safety selector and hammer. Check Price. The Rare Breed trigger requires a full auto bolt carrier. A binary trigger is a replacement trigger that features two modes of firing, semiautomatic and binary or “echo” in the case of one brand. Aug 19, 2022 · Do you need a full auto BCG for a binary trigger? The BFSIII trigger is compatible with guns that take AR-15 triggers. Fostech is known for its attention to detail and quality control. Position two is traditional semi-automatic, and position three is the fun mode! That is when the AK is placed in binary mode. FRANKLIN ARMORY® FAI™ Binary® Marked Forged Lower Receiver. ” In Binary® mode, a single round is fired when. You can own a M16 parts kit as long as you do not own an AR15 or the parts to make one. 2: trigger is pulled and hammer falls igniting cartridge. If it runs reliably with a normal trigger then it'll be just as fine in your Fostech. Your choice in BCG won't affect the function of the Fostech as long as it's a full auto BCG. Lastly, replace the safety selector and hammer. 1 Feb 2023. I’ll go this route and test as I go. essentially it is literally a full-auto trigger in function. Iraqveteran8888 says they can be best described as a mechanical “response” trigger, firing one round on. Normally, a full-auto AR-15/M4 is going to run you somewhere around $4,000 (if you have the dealer's license for a Dealer Sample) or $20-30,000 for us normal folk, plus a tax stamp, and a long wait period. This can be useful in many situations, and more importantly, it can be a lot of fun at the range! Getting your hands on one is relatively easy in most states. Now, that's with an earlier one, the new ones are supposedly a little different so this may not matter. Apparently the Echo can only be used in a M4 BCG and it cannot be used with a. M16 bolt carrier groups work in both M16s and AR 15s. I’m not familiar with the Ratler, but can you adjust the gas at all? How fast does it run without the cash on it? Also, did you ever get one to run in a RDB set up? I. I'm in the early stages of thinking about getting one. The carrier itself is machined from 6A1-4V titanium, while the bolt is sturdy 9310 tool steel. The guys in this video shoot a full auto and rare breed together and compare. Army, the average soldier will hit a. An awesome AR-15 needs a great bolt carrier group (BCG). You can use a standard semi-auto bolt carrier. If you need the stronger buffer spring, it comes with the trigger; don't adjust things until you install and test the trigger. Install the Franklin trigger in your lower and let awesomeness commence. 17 per kill for the military sniper. A binary trigger for an AR will cost $300 to $650. by Joker , from NV, United States Asked on September 27, 2020. Call your doctor at once if you have: fever, chills, aches, weakness, flu-like symptoms; cough or trouble breathing; pain or burning when you urinate; a weak stream of urine, trouble emptying your bladder; blood. (The trigger pull in semi is about the same as a single stage high dollar trigger. What makes you a criminal is drilling the auto sear hole in the receiver. With patience and knowledge it can be done easily and reliably. Fostech triggers require a fully automatic bolt carrier group to be . This full mass carrier is good for almost every rifle purpose. You will need a full auto bolt carrier in your firearm for the Echo AR-II to function. We shoot it, then shoot a full auto ar15, so you can see the difference. It's not a spring issue since. No buffer in there. 26 Mei 2018. Jul 18, 2022 · Do I need a full auto bolt carrier for binary trigger? The quick answer is no. If you need the stronger buffer spring, it comes with the trigger; don't adjust things until you install and test the trigger. Answered by Armando R. I got into a discussion regarding full auto components of the AR 15. View Product. Now, it is important to know that using an M16 BCG won't make your rifle fully automatic. For AR-pattern rifles, you will need a full auto bolt carrier group (the good news is that most of them come with one anyway) and an H2 buffer. #4 · Oct 1, 2011. It can make you go nuts (the above is probably half of my BCGs). 22 conversion kit or a 308, whereas the Franklin version can used any BCG and can be used with a. I know you dont have to have a tax stamp to own one. It is wobbly even tho im using the pins it came with The trigger when it does work is very very hard to pull and will only fire 2-3 rounds. Result is you have to clear the gun. However, it is a serious issue in other states. Installation is a breeze, and the Echo AR-II is compatible with a wide range of firearms. The bfs should run with just about any BCG full auto or semi auto. Updated Answer: You will need a full auto bolt carrier in your firearm for the Echo AR-II to function. /r/ar15 is here for your favorite black gun links, build pics, questions and other tactical or practical. Muscle memory is a hell of a thing, and after who knows how many trigger pulls, resetting a trigger for the next shot is basically an instinct; it's something you don't have to actively think about. According to the U. 99 Save 10%. [#5] How much is the foster 500. by Joker , from NV, United States Asked on September 27, 2020. 2: trigger is pulled and hammer falls igniting cartridge. The important part to understand is that as of this writing *, this is 100% ATF approved and legal. First of all, make sure you are using an H3 or H2 buffer and preferably a higher power spring like a sprinco red or blue spring. M16, AR-15, and Lightweight AR-15 BCGs. This means that you’ll need a full-auto bolt carrier in your AR platform for it to work properly. I was buying a binary trigger and I had read on a couple places that you needed a full auto rated BCG for it to cycle properly. As others mentioned below, you may need to fiddle with some different buffer weights, spring strengths, etc. The Bureau of Alcohol, Tobacco, Firearms, and Explosives (ATF) calls binary triggers “forced reset triggers,” which are a device added to firearms to increase the speed of firing. Is the Alamo-15 a forced reset trigger? 35. you first pay the 20k, send the paperwork and in a year, if you pass an FBI background check you get to go get your weapon. No special BCG required. Normally, a full-auto AR-15/M4 is going to run you somewhere around $4,000 (if you have the dealer’s license for a Dealer Sample) or $20. 5 Creedmoor rifle. The carrier itself is machined from 6A1-4V titanium, while the bolt is sturdy 9310 tool steel. Bravo Company Manufacturing (BCM) M16 BCG. Ideally, you want the fastest cyclic. Now, we can only cite that owing to this weight a fully automatic BCG is more stable, can reduce the damage, and has lower recoil as compared to the semi-auto ones. Also, you can simply swap uppers and use any upper receiver you have in your collection. This binary action is possible, thanks to the 3-position selector feature that gives your rifle three modes: Safe, Semi-automatic, and Binary. 56 mm NATO, 300 AAC Blackout. Is the Alamo-15 a forced reset trigger? 35. 62x39 ar and have a few q's. Regarding the design, the full bolt carrier features a 2-inch rear section, making the gun cycle fully automatic. For those not familiar with a DIAS, it is a device that drops into an AR lower and acts as a secondary sear engagement. No special BCG required. SHOP NOW. The Franklin works great once you learn the trigger cadence. The trigger offers safe, semi-automatic, and binary firing options. Check The Latest Price. 200 Ruger rounds. There is only 1 modification that needs to be made for proper function. Back edge to bottom of bolt is pretty simple for the needed sear trip edge distance, since you do have a colt full auto 9mm bolt to measure from the back of bolt to the bottom trip shelf to get the needed dimensions that you need to match with another bolt so the trip ledge is correct from the back of the bolt (mill back, but in most cases. A felony conviction means all guns will be confiscated etc. We will also discuss the benefits of doing so. The full auto BCG is heavier than the semi-auto to slow the BCG as it recoils and moves forward. For the most part, if you clean the BCG and keep it oiled, it will run for a long time without issues. This Franklin Armory binary firing system is specifically for the CZ Scorpion and it works phenomenally well. 99 Save Up to 14% View Product Write a Review Provide Your Answer 0 / 5,000 Report Question. Quoted: When in binary mode it only uses the binary disconnector, the other is pressed down. Using this trigger on an AR-platform firearm gives you the ability to simulate full-auto firing from a semi-automatic weapon. If you have any questions in $. SHOP NOW. 26 Mar 2018. Designed for AR-pattern firearms, the FRT-15 may not work with other guns that use AR trigger systems, owing to how it interacts with the bolt carrier. The new Rare Breed Triggers FRT-15 trigger for the AR platform allows very rapid semi-automatic fire from an AR-15 rifle. 99 Save Up to 10%. The Franklin Armory binary trigger in its natural habitat. 62x39 ar and have a few q's. They do fit in the MK47 lowers and they do run. My understanding is that the Foster is the better of the two because it is timed to the bolt the same way a full auto is. The Franklin ran great a. I’ll go this route and test as I go. In fact, an M16 or full auto BCG is the most common form of BCG on the market. If you have any questions in $. M16 vs AR-15 BCG. In this mode the trigger will release the hammer when pulled and upon release after the bolt has reset the hammer. Best AR-15 Bolt Carrier Groups (BCG) 1. The Franklin ran great a. Normally, a full-auto AR-15/M4 is going to run you somewhere around $4,000 (if you have the dealer's license for a Dealer Sample) or $20-30,000 for us normal folk, plus a tax stamp, and a long wait period. There is also a quirk with this trigger. Additionally, simply adding an M16 BCG to your AR-15 will not give it full auto. OpticsPlanet Exclusive Franklin Armory BFSIII AR-C1 Trigger - Binary Firing System for AR Platforms (4. This means that you’ll need a full-auto bolt carrier in your AR platform for it to work properly. 300 Blackout AR pistols. It changes the look of the rifle but looks good on there and selector functions well. Without the Binary function you get a safe 1-pound trigger that’s faster than the BGRF. But if you install a FosTech Outdoors Echo AR-II Drop-In Binary Trigger, it could get you close enough to your rapid-firing desires! See 3,000+ New Gun Deals HERE But is it worth all the hassle? Well, in this review, we hope to give you the full lowdown of what this unique trigger design is all about. The shelf sits a bit higher which prevents you from using them since the upper will no longer close in place. The result is a dramatic increase in AR. TacticalPirate said: My research suggests pros and cons to both the FosTech Echo and Franklin/s binary. 9 Feb 2021. 99 Save 10%. TacticalPirate said: My research suggests pros and cons to both the FosTech Echo and Franklin/s binary. 4: trigger released, hammer slips off hook jumping over sear, ignites cartridge. 99 Save Up to 10%. Trigger Lock Spring (J) in place of your factory, full length Trigger Lock Spring (L). These are 100% legal and do not turn your AR into a Class III Weapon. OpticsPlanet Exclusive. These are 100% legal and do not turn your AR into a Class III Weapon. Most AR-15 receivers won't even accept the auto sear if you drilled the hole. View Product. In order for an A. This can be useful in many situations, and more importantly, it can be a lot of fun at the range! Getting your hands on one is relatively easy in most states. However, in some. Without the Binary function you get a safe 1-pound trigger that’s. 26 Mar 2018. They work by using the recoil of the gun to push the firearm back while you push the firearm forward. You will learn who manufactures the best binary triggers and which one is best for you as we continue. The TL;DR is that the FRT-15’s sear forces the trigger to reset with every shot even if you keep. But if you install a FosTech Outdoors Echo AR-II Drop-In Binary Trigger, it could get you close enough to your rapid-firing desires! See 3,000+ New Gun Deals HERE But is it worth all the hassle? Well, in this review, we hope to give you the full lowdown of what this unique trigger design is all about. Do you need a full auto bolt carrier group for this to work? — 1 Answer by Joker , from NV, United States Asked on September 27, 2020 OpticsPlanet Exclusive Franklin Armory BFSIII AR-C1 Trigger - Binary Firing System for AR Platforms (4. Let’s just start with our editor’s pick for a branded mil-spec BCG. Franklin Armory BFSIII-ARC1, image from the official site. I want to swap out the semi auto BCG for a full auto one but. for some reason. FYI, the “sport” indicates this does not have the ability to cancel the second shot from the selector, you must move the “paddle” in front of the trigger while keeping the trigger depressed, and also lacks a semi auto mode. Position two is traditional semi-automatic, and position three is the fun mode! That is when the AK is placed in binary mode. Cartridge: 223 Remington, 5. They contain the lightweight features of aluminum, but it. The FRT-15 uses energy from the bolt to reset the trigger forward, allowing rapid, but not automatic fire. 300 blackout build? Well this is a perfect option for you! The carrier itself is manufactured out of 8620 tool steel. For those who don't know what an AR57 is, it is an AR platform rifle chambered in 5. pornos chapn, hairymilf

The rest they wouldn't sell to you if they were NFA / illegal to own. . Do you need a full auto bcg for a binary trigger

In this mode the <b>trigger</b> will release the hammer when pulled and upon release after the bolt has reset the hammer. . Do you need a full auto bcg for a binary trigger kim possible pornography

Yes, they do work as advertised. 7 x 28 thread in this section. (The trigger pull in semi is about the same as a single stage high dollar trigger. It ejects the spent brass down where an AR-15 magazine would be (people modify AR magazines to catch the spent brass). Before you pull the . With patience and knowledge it can be done easily and reliably. This is one of the best binary triggers for AR-15s and by far the easiest to install. When the BCG moves forward it has to disengage the locking back so that the trigger can pivot to the rear again. BUMP FIRE. Well now there is a new DIY method for an AR-15. Glad to see someone else enjoying their own. The even shorter lived version, but easier to tune is a few layers of scotch tape on the pad on the trigger. 9 Okt 2021. Not a lot you can do to slow that down either. Secondly, the WOT is a system that requires some tuning. ago I have both, the Franklin BFSIII is a much better option. Insert the first trigger pin to the left side to hold the left spacer and the second pin to the right side. Carefully read your state’s firearm laws to keep your gun legal. There is no disconnector or auto sear. There is no disconnector or auto sear. 3 Agu 2017. Installation is a breeze, and the Echo AR-II is compatible with a wide range of firearms. plus it includes multiple biffer springs and trigger springs so you can choose which works best for you. Enhanced Buffer Springs. Most AR-15 receivers won't even accept the auto sear if you drilled the hole. Cartridge: 223 Remington, 5. The high shelf was created to prevent the use of DIAS' and swift links. This uses Klaviermeisters CBT select fire setup but as the mp5 action is much different then the ar15 action it needed a new way to handle locking the trigger back after the trigger resets and a way to release the trigger after the BCG is in battery. Somebody on youtube was able to get a Fostech Echo 2 to work with a modified BCG to full-auto cut dimensions. The Echo Sport trigger is designed to work in direct impingement AR-15 platform firearms and works with any standard full-auto style bolt carrier group which are the BCGs that are utilized in virtually all current production ARs. You will need a full auto bolt carrier in your firearm for the Echo AR-II to function. If you need the stronger buffer spring, it comes with the trigger; don't adjust things until you install and test the trigger. The Fostech Echo gen 1 included a special carrier. The root of binary is bi, meaning two. In this mode the trigger will release the hammer when pulled and upon release after the bolt has reset the hammer. The only difference is the full auto carrier is long enough to trip the auto sear. Franklin Armory BFSIII-ARC1, image from the official site. A FA BCG will not make your rifle fire more than a single round per single function of the trigger. General Long Gun Discussion. 28 Nov 2016. Bump fire is basically what it sounds like: You take a semi-auto weapon, set your. Army, the average soldier will hit a. Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear. Working forced reset trigger for the KF5 (3D printed mp5) With safe, semi and FRT positions. Watch the video above, which shows the trigger in action and explains how it works. The Echo Sport Trigger from Fostech is an economical pull-and-shoot trigger that gives you access to binary modes on your AR-15 rifle. The trigger is not reset and i have to take mag out and rack the bcg to get it to reset. We’ll touch on this a bit more down the road The Bolt Carrier Group. 1: hammer held by sear. In addition, the full bolt comes with a lug that you cannot find on the semi-auto bolt. M16/AR-15 Full Auto Bolt Carrier Group. Business, Economics, and Finance. I see that the Echo II does not, but I believe it does require a full-auto BCG. #4 · Oct 1, 2011. Not a lot you can do to slow that down either. The high shelf was created to prevent the use of DIAS' and swift links. FRANKLIN ARMORY® Bolt Carrier Group. I know you dont have to have a tax stamp to own one. by Joker , from NV, United States Asked on September 27, 2020. After that in 2004 it was legal again. So you decided to build a semi-automatic rifle with the proper upper receiver. Bump fire is basically what it sounds like: You take a semi-auto weapon, set your. Basically, the full-auto/M16 type of BCG has a slightly larger backend to the BCG so that it can engage with a full-auto trigger sear in a full-auto lower. Sad that the Echo doesn't work. Well now there is a new DIY method for an AR-15. First of all, please do not dremel your BCG. Regarding the design, the full bolt carrier features a 2-inch rear section, making the gun cycle fully automatic. As far as binary specific parts, pick up this spring for $10. I would note that FA does not require a full auto BCG, although I have one in my weapon. you don't need a full auto BCG for the BFS3 so if you don't have one a FA BCG already, this will be cheaper. Another competitor to simulated full auto is the bump fire stocks like Slide Fire. Carrier: Titanium. The carrier itself is machined from 6A1-4V titanium, while the bolt is sturdy 9310 tool steel. Your choice in BCG won't affect the function of the Fostech as long as it's a full auto BCG. Just like a SlideFire stock, it takes a little bit to get the hang of shooting long bursts with it. full-auto fire on a semi-auto rifle, you can get a binary trigger for . Federally, binary triggers are legal. 28 Nov 2016. The full auto BCG is heavier than the semi-auto to slow the BCG as it recoils and moves forward. TacticalPirate said: My research suggests pros and cons to both the FosTech Echo and Franklin/s binary. Bump fire is basically what it sounds like: You take a semi-auto weapon, set your finger against the trigger. They contain the lightweight features of aluminum, but it. A tax stamp is a legal requirement in most states. It can make you go nuts (the above is probably half of my BCGs). This BCG functions with any gas tube length and any configuration, from classic 20-inch barreled 5. Then finally, you’ll be ready to try it out. The semi-auto/AR-15 BCG has a smaller backend and can’t. Double Star - AR-15 5. ago Thanks for the info. Basically, the full-auto/M16 type of BCG has a slightly larger backend to the BCG so that it can engage with a full-auto trigger sear in a full-auto lower. In order to choose between the 1 lb trigger and shot-on-release mode (a. To build a M16 with today's lowers is. I think it will be best if I start a new thread on this subject. The difference between the two is that the full-auto carrier has a longer "cut" at the rear. A heavier and. Binary triggers enable you to shoot numerous rounds with a fully automatic mechanism. You should absolutely buy one though. Now, we can only cite that owing to this weight a fully automatic BCG is more stable, can reduce the damage, and has lower recoil as compared to the semi-auto ones. Is binary trigger legal in California? 37. Degrease it well, and keep adding layers until it works right, you can do this with no ammo. You will learn who manufactures the best binary triggers and which one is best for you as we continue. Pull - Bang - Release - Bang - then the trigger settles and resets for next action. It's a little convoluted but once you do it once, it's easy to do again. The trigger offers safe, semi-automatic, and binary firing options. A binary trigger (sometimes called an echo trigger or double tap trigger) is a special kind of semi-automatic trigger that allows you to significantly increase your. Although the Faxon Creedmoor Complete Nitride BCG lacks a dual ejector capability, it is still a great BCG for your Creedmoor rifle. In order to convert a modern AR 15 to full auto, you would need to install a full auto selector switch, such as an M16 parts kit, as well as a full auto bolt carrier group and a auto sear. You can also return the gun to a safe state with the trigger depressed if I am not mistaken- negating the second shot. Additionally, simply adding an M16 BCG to your AR-15 will not give it full auto. Result is you have to clear the gun. Positive Reset on Release Phase. You will need a full auto bolt carrier in your firearm for the Echo Sport to function. I was just wondering if it's legal to. If it runs reliably with a normal trigger then it'll be just as fine in your Fostech. Best Used for: Making range trips expensive but FUN!. In order to do that, you’d also need a number of fully-auto components, including a sear and disconnector, along with your full-auto BCG. If it runs reliably with a normal trigger then it'll be just as fine in your Fostech. . gayhardcore porn