Only the finest blanks in the industry can produce the best results on the range. Schneider Barrel Company makes that blank. Double Stress Relieved 416R Stainless Steel, P-5 Polygonal Rifle Form that is unique in design. 1:10 Twist, Hand Lapped, Crisp, Sharp Target Crown. 25.500 Overall Length, Chambered in 7.62 NATO, Fluted, Natural Stainless Finish ready for Cerakote. This barrel will work perfectly with standard G3/91 trunnions, G3 barrel extensions or with RCM’s longer Trunnion. This is the Cadillac Barrel for your PSG1 build