Strmlght Protac Hl-x Rail MountThe ProTac Rail Mount HL X is a 1"000 lumen weapon mounted light featuring a dedicated fixed mount for Picatinny rails. It uses either a remote switch with momentary constant on operation or a standard push button tail switch, and runs on either two CR123A lithium batteries or one Streamlight rechargeable 18650 battery. Features : Remote pressure switch High, low, and strobe settings Aluminum construction Fixed rail grabber with thumbscrew Included M