(APP: Tuya / Smart life. Aluminum Alloy Rail4 5 7 9 13 Slot for M lock Picatinny Weaver Rail 20mm Bracket. 4 Reticles Fit 20mm Rail Holographic Airsoft Red Green Dot Sight Reflex Scope. Tactical Red Lazer Beam Laser Dot Sight Scope Mount For Gun Rifle Pistol Hunting. ).