FailZero EXO Coated AR-15 Bolt Carrier Group
NOTE: BCG may ship with either a dark FailZero logo or a subdued lasered FailZero logo.
- AR-15 cut carrier
- Magnetic particle inspected
- Live fire tested
- Bolt, extractor, bolt carrier, cam pin, carrier key, and firing pin
Ratings & Reviews
by Kevin Denlinger
Nice doing business with Primary arms. As a gunsmith I never worry about customer service with PA.
Fail zero BCG
by Vito Summa
As always primary arms is the best... My fail zero BCG was great. Shipped promptly and a great price... PA is my go to for every build.
At a great price...
Love Fail Zero BCG
Awesome BCG. They had it at a great price. I should have bought 2. I love Primary Arms they have great prices and fast shipping. Thanks
by David Holand
by trey dudley
Bolt carrier group is nice and tight, functions flawlessly and I will be getting another soon for my s&w ar15. Primary arms was a measure to deal with, and teleported to my door in just 3 days halfway across the country
Quality products and services
Building my current project I have searched for quality and best deal combined for many of the parts. In doing this primary arms has now become my "go to" site as they offer such a wide variety and have great turn around.
by Robert Cherry
Everything it needed to be! Customer service I received made it even better.
Fail Zero Review
by Travis Eller
Excellent BCG, finish is amazing. Very slick very consistant. Feels great with very minimal lubrication. Smooth and all great internal parts and proper staking. This is one of only 2 BCG I recommend.
by John Shelton
Excellent customer service...fast shipping...great sale price...perfect for my pistol build...Thanks again Primary Arms...