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
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 hard to find in August 2026, in stock on only 4 of the 7 days we checked, and today the one retailer we track is out of stock. Prices barely moved in August 2026, holding around $351.99, so there haven't been real sales lately. 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 31 retailers
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