Q: On the previous question about 7.62 x 39 working with the Grendel or .264 LBC. Was the answer yes it should work with a Grendel case because it is the parent round for the Grendel?
A: 7.62x39 is not interchangeable with a 6.5 Grendel, they have two different bolt faces. 7.62x39 has a .125" Bolt Face and the 6.5 Grendel and LBC 264 have a .136" Bolt Face. For a 6.5 BCG you would need this BCG: https://www.blackriflearms.com/M16-65-Grendel-Enhanced-Bolt-Carrier-Group-with-Buffer-Technology-_p_296.html
Q: Do you have a list of upper side chargers that your upper system will work with? What about DFA products? Thank you, -Hunter
A: Gibbz Arms and Spartan Side Charger with no modifications. The other side chargers on the market require bolt carrier modifications, we don't recommend any side chargers that require bolt carrier modifications. DFA folders require the bolt carrier to be modified to work with their proprietary buffer and spring assembly.
Q: I own one of your 7.62x 39 enhanced bolt s.....it is running fine....as far as spares go are you seeing any broken bolt lugs?at what round count do you recommend bolt replacement. Thanks
A: We always suggest having a spare bolt assembly and extractor. We see little issues with broken bolt lugs, you mostly see failures with the extractors. An overgassed firearm will cause more stress on the extractor and premature extractor failures in this caliber.
Q: Will this work with a JP silent capture buffer?
A: JP Silent Capture Spring is not compatible with our carriers buffers. In order to use JP Silent Capture Spring, the end user would need to make modifications to the carrier's integrated buffer.
Q: Any idea if this bolt will work in the KS47 being sold by Palametto State Armory?
A: The KS47 is designed for use with AK mags; therefore, our AR-15 bolt carriers will not work with KS47 or any hybrid rifle that runs AK mags as the bolt carrier has to clear the AK mags so they have different tolerances than mil-spec AR-15 bolt carriers.
Q: Will this BCG work with a Bear Creek Arsenal Upper Receiver in 7.62x39?
A: Our BCG is mil-spec to dimensions so it should fit any AR-15 that is built to mil-spec.
Q: Part two from my previous question. Does this BCG work in a standard 223/556 upper or does the Upper Receiver have to be made for 7.62x39? My next build will be in 7.62x39 but I'm not too knowledgeable in what upper receiver to pair with your BCG. What upper receiver do you recommend?
Thank you in advance!
A: All of our AR-15/M16 BCG's are for the AR-15 platform and if you want to pair the Bolt Carrier from your 7.62x39 to your 5.56 you can; however, you would need to switch out the bolt assembly to a 5.56 bolt assembly and the enhanced firing pin to standard AR-15 firing pin. The bolt carrier, cam pin and firing pin retaining pin are interchangeable with any AR-15 upper. You can use any mil-spec AR-15 upper receiver with our Bolt Carrier. Aero Precision makes some nice uppers/lower receivers.
Q: Would this bolt carrier be usable in a 223 upper with the appropriate bolt installed(from a spares and interchangeability aspect)? After checking headspace I assume?..thanks
A: Yes the 7.62x39 utilizes an AR-15 bolt carrier that you can swap other AR-15 bolts, firing pins, etc if one would need to change over to a 5.56, 6.5 Grendel, 5.45x39 and other AR-15 calibers. So if one gets this 7.62x39 BCG then wants to utilize it in a 5.56 then the only parts you would need to change out is bolt assembly and firing pin as our 7.62x39 BCG utilizes an enhanced firing pin so one would need to swap it out to a standard AR15 firing pin.
Q: Can this fit my Colts Sporter?
A: Our bolt carrier will fit any AR-15 that utilizes mil-spec bolt carrier. If Colt utilizes a mil-spec bolt carrier group in their Sporter Rifle then yes our bolt carrier group will work with your setup.
Q: Can this be drilled and tapped to use with a BCA reciprocating side charge upper?
A: We have had other customers tap and drill carriers for use with side charging uppers our only disclaimer is it voids the warranty and you will have bare metal which will allow for corrosion.