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FailZero
Overview
The FailZero Bolt Assembly is designed specifically for the 5.56 NATO caliber, providing a robust and reliable component for your AR-15 build. Its Nickel Boron finish enhances durability and reduces friction, which can improve overall cycling and ease of maintenance. This bolt assembly frequently appears in builds utilizing a carbine gas system, particularly those chambered in .223 Remington.
Specifications
FailZero Part Bolt Assembly, Nickel - EXO-BOLTASSEMBLY01
Available Merchants(5)
Prices checked
Price Alert
Build history on GunPartPicker
Availability is good: it was in stock at one retailer or another nearly every time we checked in October 2026, and today all 5 retailers we track have it in stock. Buying today, the lowest price is $73.41 at BattleHawk Armory, which matches the best price we saw in October.
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Frequently Built With
The part most often added in each category by the builds that include this one
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PSA 7" Nitride 1:7 Pistol Length 5.56 NATO Marauder AR-15 Upper Assembly, Black - No BCG/CH
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Magpul M-LOK AFG Angled Foregrip - Black
Builds Featuring This Part
See all builds →Builds in the community that include the FailZero Part Bolt Assembly, Nickel - EXO-BOLTASSEMBLY01
| Build | Parts | Total |
|---|---|---|
 | 24 | $1066.24 |
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