20" Barrel AR-15 6.5 Grendel Rifle Length Gas Port 1 in 8" Twist Stainless Steel


Match-grade accuracy

Unprecedented durability

Double-stress relieved 416R stainless steel

Single point cut rifled and twice hand lapped

Proof Research's steel barrels are produced in-house from double-stress relieved 416R stainless steel. This pre-hardened chromium steel is ideally suited for match grade rifle barrels. Each barrel is drilled, contoured and reamed to bore diameter. It is then cut rifled, lapped, and inspected via borescope. This ensures an extremely consistent and accurate finished product.

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