High-quality Picatinny rail for Winchester Model 70; Compatible with WSSM, Short Action, Long Action, and WSM models; Long action fits pre-64 and post-64 Winchester Model 70 rifles; Beveled edges for ambidextrous use; Full-length Picatinny cross slots for flexible accessory mounting; Center channel reduces weight and preserves iron sight functionality; Machined in-house with Type II anodized finish for durability; Installation torque: 20 in-lbs with blue Loctite recommended; Hole spacing dimensions: Short Action 3.259", Long Action 3.805", WSM 3.514", WSSM 3.225"