The Rogers Super-Stoc is the ultimate refinement in AR/M4 stock technology. the Rogers Super-Stoc is the most stable, collapsible stock available due to the innovative cam-lock system developed by bill Rogers, famed shooting instructor, inventor of holsters, target systems, and other related products, and his staff of engineers. the cam-lock system completely removes any slop or play inherent with collapsible stocks. once the desired position has been selected, the Super-Stoc can be locked down solid, simply by clicking the cam-lock lever upward. pressing the quick release lever will disengage both the cam-lock and the detent pin, allowing you to quickly readjust the Super-Stoc position. the innovative Super-Stoc also removes the guesswork involved with buffer tube sizes. the Super-Stoc will fit both a Mil-Spec sized buffer tube as well as a commercial sized buffer tube with a few simple adjustments. weighing in at only 7.3 oz, it is among the lightest stocks available. the Rogers Super-Stoc is simply the best collapsible stock for your AR style rifle.