UTG Model 36 handguard Picatinny rails Aluminum 2 screw holes on each rail 6 long 13 numbered slots 6 long 5.6 oz. Includes 3 rails, 8 screws and a hex wrench Attach lasers, flashlights and other accessories to your airsoft gun or firearm. This set contains 3 Picatinny rails with mounting hardware. Simply use the included Allen wrench to attach the handguard Pictainny rail to your gun for added versatility.