Leapers UTG Pro MTU028SG 870 Picatinny rail mount features:- precision machined from Aircraft grade aluminum with matte back hard coat anodize- 6.10" extended length with 14 Picatinny rail slots for dot sights, rear sights, and flexible positioning of magnified optics for proper eye relief adjustment- low profile with see thru design for use of front bead sight- contoured bottom perfectly fits Remington 870/1100 tm with drilled and tapped receiver includes:- assembly screws and tools for simple and friendly installation- no gunsmith specifications:- rail type: Picatinny/Weaver- number of rails: 1- material: aluminum- length: 6.10"- width: 0.83"- height: 0.34"- weight: 1.55 oz.- color: black.