Great for slug shooting, turkey hunting, security, home defense or tactical use. Fits standard Stevens 320 12 gauge pump. Locking bolt replaces the original trigger pin. Easy to install in existing pin port on the receiver - no gunsmithing or special tools required Solid one-piece design of saddle style that straddles both sides of the receiver 13 slot see-thru designed Weaver/Picatinny rail for attaching scopes, red dots, sights, light, lasers, etc. Perfectly contoured to receiver Made from lightweight aircraft aluminum Satin black finish Length:6.75" Width:1.75" Height:3.25" Weight:4.6 oz