FailZero AR9, 9mm BCG, Black Nitride
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FailZero
Overview
The FailZero AR9 Bolt Carrier Group is designed specifically for 9mm builds, featuring a Pistol Caliber Blow Back Carrier style that ensures reliable cycling and function in your AR platform. Its Nitride finish provides enhanced durability and corrosion resistance, making it suitable for regular use in various conditions. This BCG is commonly found in builds focused on 9mm performance, providing a smooth shooting experience for those looking to maximize their pistol caliber AR setup.
Specifications
Build history on GunPartPicker
Builders have been adding the FailZero AR9, 9mm BCG, Black Nitride to their builds on GunPartPicker since February 2026. All time, it ranks #47 of the 446 bolt carrier groups builders have added. Builds with this bolt carrier group are nearly all chambered in 9mm, nearly all on blowback gas, and nearly all AR-9.
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today all 4 retailers we track have it in stock. It dipped to $132.03 at BattleHawk Armory for a stretch in September 2026, under its usual $139.98 to $142.08, so sales do come around. Buying today, the lowest price is $132.03 at BattleHawk Armory, which matches the best price we saw in September.
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Frequently Built With
The part most often added in each category by the builds that include this one
Spike's Tactical Flat Top Upper w/ Ejection Port Door, 9MM, Black - SFT902D
Breek Arms AR-15 Warhammer MOD2 Ambidextrous Charging Handle Black
Harrington & Richardson 635 Stripped Lower, Black
Rise Armament Super Sporting AR15/10 Single Stage Trigger - Flat - Dtom Special Edition
Fortis SHIFT Vertical Grip - M-LOK
HEXMAG Rubber AR-15 Tactical Pistol Grip, Black - HX-HTG-Black
Builds Featuring This Part
See all 4 →Builds in the community that include the FailZero AR9, 9mm BCG, Black Nitride
| Build | Parts | Total |
|---|---|---|
 | 14 | $1479.82 |
 | 14 | $1113.63 |
 | 25 | $6943.77 |
 | 9 | $880.89 |
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