Knoxx SpecOps Stock Unique Features Include: Instantly adjustable to fit all shooters (11.25 to 15.25-inch length-of-pull) Perfect fit with load-bearing and ballistic tactical vests. Dual recoil compensation systems eliminate harsh recoil with all loads Unique design cuts muzzle rise – Get back on target faster Eliminate shoulder fatigue and related recoil injuries Designed to fit any and all shooters, and practically devoid of recoil, the SpecOps Stock is the latest in the Knoxx family of recoil-reducing products. Not only is it utilizing two recoil-absorbing mechanisms to soak up recoil, it also adjusts to fit any shooter regardless of the situation or application. Hunters and competitive shooters will find their scores and hit ratios improving as flinching and recoil anticipation dramatically decreases.