Arisaka’s 600 Series Light Body is a low-profile replacement for the Surefire M600 series of scout lights that provides more clearance for back up iron sights or accessories. The 600 Series body has been CNC machined without the protrusions for the stock Picatinny clamp and interfaces directly with an aftermarket Scout mount like one of Arisaka’s Inline Scout Mounts. The 600 Series Light Body is compatible with both E2 series and M600 series tail caps as well as heads similar to the E2T, KM2B, KX2C, and KE2A. The 600 Series light body also fully supports IR heads and accommodates two 123A batteries. DOES NOT INLUDE HEAD, MOUNT, OR TAILCAP Color: Black Uses E2T, KM2B, KX2C, and KE2A style heads. Compatible with E2 series and M600 series tailcaps 6061 T-6 Aluminum construction Weight: 0.6 oz The 600 Series Light Body from Arisaka is made of 6061-T6 aluminum with a MIL-A-8625 Type III hard coat anodization. The interior of the light body is treated with a MIL-DTL-5541 Type II Class 3 chem film for maximum conductivity and protection from oxidation.