Specifications:AR15/M4 LED Flashlight with Strobe and A2 Iron Front Sight Post3 Watt Bright CREEA(R) LED Flashlight, 150 Lumens Peak Output.A2 Front Sight Post is at the 1.5" AR15 Height for back-up iron sights. A2 Post is adjustable for elevation.Ambidextrous button arrangement, two button on each side for Momentary (rear button) and Constant On/Off (forward button). Buttons are easily accessible from your support hand when grasping handguard.Back of flashlight features a rear mounted button for the Flashlight Strobe feature and a 3.5 mm jack in the back for the included remote momentary pressure switch.Mounts onto Weaver/ Picatinny/ MIL-STD 1913 type rails.Flashlight can extend past the edge of the handguard with the cantilever style mount design, preserving rail space and for making a more comfortable hold on the shorter carbine Picatinny handguards.Die Cast Aluminum Body with Black Anodized bodyUses 1 CR123A Lithium Type Battery (Included)Dimensions: 3.5"L X 1.6"H X 1.4"DWeight 4.2 oz. without pressure swicthWeight 4.6 oz. with pressure swicthUS PAT. D808489