Criterion Barrels 20in AR-10 Rifle Length Gas System Barrel .308 M118 LR 1-10 Twist Parkerized 4140/4150 Chrome Moly Steel
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Criterion Barrels
Overview
The Criterion Barrels 20-inch AR-10 barrel is designed for the .308 Win caliber, featuring a rifle-length gas system that ensures reliable cycling and reduced recoil. With a 1:10 twist rate, this barrel is optimized for stabilizing heavier projectiles, making it suitable for a variety of precision applications. This barrel commonly appears in builds focused on long-range shooting and tactical applications, where accuracy and performance are paramount.
Specifications
Criterion Barrels 20in AR-10 Rifle Length Gas System Barrel .308 M118 LR 1-10 Twist Parkerized 4140/4150 Chrome Moly Steel
Available Merchants(1)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Criterion Barrels 20in AR-10 Rifle Length Gas System Barrel .308 M118 LR 1-10 Twist Parkerized 4140/4150 Chrome Moly Steel to a build in March 2026.
It was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $351.99 at Optics Planet for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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