Designed for lights compatible with the M-LOK attachment system, the Midwest Industries M-LOK Compatible Extension Beam allows you to move your light forward 3" on your gun. This helps reduce shadow, while also providing addition rail space for other accessories. M-LOKA(R) compatible extension beam Designed for M-LOKA(R) compatible lights, such as SureFire Scout Light Pro Series Works with other M-LOKA(R) lights and accessories Moves light forward 3 inches to reduce shadow and provide additional rail space Weight: 1.0 oz Constructed of Hard Coat Anodized 6061 Aluminum Made in the USA Mfg: Midwest Industries