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...
by Bradley Dale
Fast shipping, excellent customer service, will continue toorder from PPrimary Arms
Good product, good price
Good looking product, staking could have been a little bit better. This was my first purchase from Primary Arms. Excellent shipping, good communication. Very pleased and will buy from again.
Perfect for the Price!
Got it on sale for $109 for my new built; took it to the range and what a difference. Runs and cycles without issues and very smooth operation.
Fail Zero Bolt carrier
by Mike Means
Got my bolt carrier today quick service like all the reviews said very happy with Primary arms.
by Jonah Boudreaux
Got this cuz it was on sale for 99$, ran it a couple times so far with no jams, nice lookin finish for rifle
Awesome BCG! Fast Shipping!
by Mikeal Morgan
Great BCG and very fast shipping. Thanks!
fail zero bcg
by Scott McDaniel
Great product fit perfect would highly recomend
Have run this BCG in my RRA LAR15 for years so when these went on sale I jumped on one to complete an upgrade project on my 20+ year old EA-J15 which is now range worthy again.
High quality product, slipped right in. Can run without lube (I ran 500 rounds just to test it out and it ran fine), and wipes clean with a cloth. Extremely fast shipping, and great price. They cost more straight from FailZero and this is the lowest price I've found. I'll never use any other BCG's in my AR's.
Fail Zero EXO Bolt carrier
I bought this for a new SPR type build I have not yet installed it but it looks to be of good quality. I will report back once I get to use it.As always PA was quick with the delivery. Keep up the good work.
I have been waiting to try one of these Zero-Fail bolts for a long time. I finally bought this one but was disappointed when it arrived. The entire bolt has a "smokey" look. Looks similar to the stains on other NiB bolts that I have (after shooting). The carrier seems to be clean, just stained. The bolt had Carbon deposits all around the tail. I scraped off the carbon and cleaned the whole BCG. Will see how it performs when I get it to the range. It has Obviously been Used... Did not see THAT in the description.
by Clayton Blair
I recently purchased this bcg for a 300blk build and it is awesome! Great quality and very smooth. Would purchase again!
by Lucas Urlie
I've put a couple hundred rounds through my gun with this BCG and have had no issues whatsoever. I have never ran it without any oil, it goes against nature for me to not oil everything. But overall I think it is a great BCG and I would definitely buy it again.
Fail Zero Bolt
by Charles Corliss
Looks good have not had the chance to try it yet. Fast shipping.
by Cody Payne
Looks great and after 240 rounds through it I couldn't be more pleased.