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 Richard Craig
Ordered and received in less than a week on Thanksgiving week. Awesome product!
new to NIB
PA had the best price on this BCG. haven't assembled the 300 aac upper yet, but tried it on my 5.56 upper. I did run it wet & it functioned flawlessly. I may try it w/o lube just to see if it lives up to the hype. So far, happy with it & will buy again when on sale. Thanks Primary Arms!
by John Welsh
PA is awesome. Good prices and same day shipping. Exactly what I was looking for.
Third one purchased
by Thomas F DiCamillo
Purchased 2 at Christmas time for $98.00 each. Paid a little more for this one but still worth it.
by Sean Meyer
Purchased this for a new build. Looks great. Have not tried it out yet. Wish I had waited though as 2 weeks after I received it they were on sale for $60.00 less. Oh well.
by Emmanuel Torres
Smooth bcg that will save me tons of time when cleaning. Bcg slid right in with no effort what so ever.
by justin walker
Speedy service, fair pricing and good products make primary arms my go-to store. I recommend them to everyone needing parts or optics.
by Michael Ashwood
Switched it out in my AR and worked like a champ
Fail Zero bolt
by jordan hamilton
The bcg is awesome what more can I say. Fast shipping and great prices from primary arms.
I found the bolt to deserve 5 stars!
by Richard Thornton
The bolt Carrier Group arrived and I was very pleased when I opened the box and first saw it!It is well machined, few to almost no machine marks are visible. INSIDE AND OUR THE BCG is WELL MACHINED. Tolerances are perfect and finish is great. The nickel finish is even and well applied. The function of the bolt was flawless. I fired one round for safety check. NO PROBLEMS I fired three rounds for function check. NO PROBLEMS I fired 2 round for sighting corrections. Then fired three rounds for grouping. A 1/2" group at 50 yrs. BCG locked open on empty magazine. The bolt functioned every time and grouped the empty cartridges in a small circle to the right and behind me just as it should. I L O V E T H E B C G!