Specially designed for use on G36 rifle handguards. Precision machined from aircraft aluminum alloy with hard anodized finish for wear resistance. Two 3 7/8" Picatinny Rails Each with 7 Numbered Slots 2 Screw Holes on Each Rail Complete with 5 Hex Screws and Allen Wrench Material: Aluminum Weight: 2.3 oz Pieces: 2 Rail Type: Picatinny/Weaver