Proof Research Ss Pr15 6.5 Grendel Barrel 1 8 Twist 0.75 Gas Block

The Proof Research SS Pr15 6.5 Grendel 20" rifle barrel delivers match-grade accuracy with unprecedented durability, forged from double-stress relieved 416R stainless steel produced in-house to exacting standards. This pre-hardened chromium steel is ideal for precision rifle work, offering exceptional stability and repeatable performance across extreme conditions. Each barrel is meticulously drilled, contoured, and reamed to bore diameter, then cut rifled, lapped, and inspected via borescope to ensure an extremely consistent and accurate finished product that shoots tight groups time after time. Measuring 20 inches in length with a 6.5 Grendel chambering, a 1:8 twist, and a 5/8-24 thread pattern, this barrel balances speed and stability for a wide range of match setups. The medium contour provides the ideal blend of rigidity and weight, while the rifle-length gas system and 0.75-inch gas block diameter deliver reliable cycling and smooth recoil impulse. M4-style feed ramps ensure reliable chambering and feeding from a wide variety of magazines. Whether upgrading an existing precision build or assembling a dedicated long-range rig, Proof Research's in-house manufacturing and exhaustive quality control translate to superior performance, durability, and confidence at the bench and on the range.