The SureFire Adjustable Offset Adapter A17 is an adjustable single-offset adapter that facilitates the mounting a SureFire WeaponLight or a laser module to your firearm. The A17 must be used in conjunction with a weapon-specific adapter-mount.
The adjustment feature provides versatility when mounting and positioning your light on your firearm. When you find the perfect spot for your light, just tighten down the knurled adjustment knob to permanently lock the assembly into place.