... , made in the US, is impervious to shock for 100,000 hours lifetime.7.Effective Range in pure darkness: 500m-1000m8 ... )11. Inside use High Accuracy Tacical Waterproof O-ring12.Weaver Mount: Tube diameter is 1 inch(25.4mm), Rail system Wide ... Laser marking machine for free fee15.Accessories: LED flashlight, Weaver Mount, wrench, Mouse rail switch, on/off switch, migc paste ,2pcs ...