Expo Arms 5.56 NATO Complete M16-Cut AR-15 Bolt Carrier Group - Nitride
- .233/5.56 NATO
- Salt bath nitride finish
- M16 cut
- Aircraft quality 8620 steel carrier
- 4130 steel gas key
- Properly staked grade 8 gas key screws
- Carpenter 158 steel bolt
- 4140 steel extractor
- MIL-SPEC O-ring
- MIL-SPEC gas rings
- 4140 steel cam pin
- 8740 steel firing pin with hard chrome finish
- Magnetic particle inspected
- Lifetime warranty
- Proudly made in the U.S.A.
Ratings & Reviews
by Erin -
Updating my review. I've had this for about 7 months as of 3/06/19. I have about 800 rounds cycled so far with this BCG and I have not had a single malfunction. This is paired with the Bear Creek 7.5 inch nitrided barrel. Again... the machining and finish are perfect. Been recommending this BCG to everyone. Unless you want something really fancy or gotta have a specific logo, I see no benefit in spending more on other brand names when you get the same quality for less.
by Erin -
Will update if I have any issues but upon initial inspection this is a very nice BCG. Mine has absolutely no tool maks, the nitride is smooth and looks really nice. BCG is in spec compared to other BCG's I have. I'm happy with this purchase.
Awsome sales experience and great product
by J of KC -
This item was an add on option to the Bear Creek Arsenal 16" Mlok 300 AAC Blackout upper assembly I purchased to add functionality to my home built 5.56mm AR. This is a melonited (Nitrided) BCG. After a day at the range, I came home and cleaned the upper. The melonite finish makes cleaning a very easy task. This BCG functioned flawlessly. I'm really impressed with the speed that Primary Arms had the upper with options delivered on my doorstep only 3 days after I ordered it.Great product at a great price. Thanks Primary Arms!