This AR15/M4 A2 front sight post with green laser and strobe function is fully adjustable. The green laser is a bright 5mw and the 1.5" AR15 height A2 back up iron sight is adjustable for elevation. Laser has ambidextrous button arrangement, two button on each side for momentary use, rear button and constant on/off forward button. Buttons are easily accessible from your support hand when grasping handguard. Back of Laser features a rear mounted button for the Laser 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. Green Laser 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. Made form Aluminum Black Anodized. Uses 1 CR123A Lithium Type Battery (Included. Dimensions: 3.6"L X 1.6"H X 1.4"D.