AR-15 Exo Barrel Extension Steel Nickel

Name: AR-15 Exo Barrel Extension Steel Nickel
Brand: Failzero
Availability: OutOfStock

Failzero · Upper Parts

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Best price

$29.99at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$29.99checked Oct 1, 2026	Out of stock	Buy at Brownells

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Price history

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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$29.99	$29.99	$29.99

Since Sep 28, 2026.

About this part

The AR-15 Exo Barrel Extension Steel Nickel is an AR-15 upper part from Failzero. One store lists it, Brownells at $29.99.

Specifications

Manufacturer: Failzero
Platform: AR-15

From the manufacturer

M4-type barrel extension has a self-lubricating EXO-treated Nickel Boron finish that aids in smooth, consistent feeding and helps prevent hang-ups. High-tech coating lasts the life of the weapon, and won't rub off, flake off, or gall. Helps dissipate heat for cooler operation, too. Precision machined from 8620 steel to USGI specifications with integral M4-type feed ramps and predrilled locator pin hole. Mfg: Failzero SPECS: 8620 carbon steel, EXO-treated Nickel Boron finish. .998" O.D., 1.168" shoulder O.D. .8125"-16UNF thread. Barrel locator pin required, available separately.