100% made in the USA, the Light Control System (LCS) is very versatile. It is precision CNC machined from 6061-T6 billet aluminum for superior strength with hardcoat anodized finish, utilizes a slot that ensures a snug, perfect friction-fit, and is fully ambidextrous and reversible. This Picatinny LCSmk2k is designed exclusively for the Streamlight ProTac series weaponlights Dual-Function tape switch that is commonly provided with the Streamlight ProTac series weaponlights. The LCSmk2k is too long for the shorter Streamlight 69132 switch provided with the TLR-series.