This BB3 is body only but can be paired with TC59 tail cap. The BB3 body is made from aviation CNC machined aluminium, hard-anodised surface, and is available in black and FDE colors. According to the driving voltage range of the light head circuit, you can use one 18650 battery or two CR123A batteries. The BB3 body can be fitted with surefire M600DF's light head (KE2-DF) and Weltool's LH1, LH2, LH3, LH4, LH5, and other light heads.
    

The TC59 (not included ) is a 1-inch diameter Click-On Lock-Out tailcap, compatible with Surefire 6P, 9P, C2, C3, Z2, L5, M2, M3, M3T,6PX, and other torch. It can replace Z41, Z58, Z59 tail covers. Can withstand 4A current.