GG&G M3 / M6 Tactical Illuminator mounting rails are machined from 6061 T6 aircraft grade aluminum alloy using modern CNC machinery. They are all hard-coat anodized matte black to mil spec. The mounting rail for the M16/AR-15 series of rifles can be easily installed by the operator with basic hand tools or purchased from us already installed on a new set of standard M16A2 or M4 handguards. Typically attached to the handguard in a location where both the momentary-on (rotate counter-clockwise) and constant-on (rotate clockwise) switch assembly can be reached by the thumb of the support hand. For a right-handed operator, this will usually be on the front of the top handguard just to the right of the centerline.