The ultra-compact KE2-B Scout Light(R) bezel assembly generates an impressive 1,000 lumens from two 123A batteries when used on an M600 Ultra Scout Light(R). This small, rugged bezel features SureFire's proprietary TIR lens, a far-reaching, high-intensity beam with ample surround light. Constructed of lightweight aerospace aluminum coated with a Mil-Spec hard-anodized finish, the ultra-compact KE2-B will withstand the rigors of combat without weighing down your weapon. Upgrade your M600 Ultra to 1,000 lumens with the KE2-B.