Mounts, Picatinny & Weaver
- What is the Difference Between Weaver and Picatinny Bases? Weaver vs Picatinny Rails Basically, they are similar in profile, but the recoil slots differ in width, depth, and spacing. Picatinny Rail / Base: Slots are 5.23mm wide and 3mm deep, with a consistent spacing of 10.01mm. Weaver Rail / Base: Slots are narrower at 4.57mm and tend to be ...