5.11 Tactical doesn't just make military uniforms and apparel - they also manufacture a great selection of service gear and military equipment. When 511 Tactical sets out to design a piece of tactical gear, they have the same users in mind as their tactical clothing lines: the soldiers, sailors, marines, firefighters, police, and security officers who put themselves in harm's way daily, and can't afford to have anything less than the very best. 5-11 Tactical gear includes a range of durable outdoor products, from flashlights to watches and much more. This 5.11's Atac A1 Replacement Tail Cap is for use with 5.11 Atac A1 flashlight. Features: Constructed from durable aircraft grade aluminum material, designed for use with 5,11 Atac A1 flashlight, as a reserve for loss or damage to the switch, four function switch with molded TPR and very durable. Material: Aluminum.