Enables Rapid Deployment Of Adjustable Stock To A Preset Position

Drop-in nylon insert lets you snap open an M4-style adjustable stock in one swift motion, and have it automatically lock in the exact position you want. Prevents over-extension of stock and saves critical seconds when deploying the rifle. Installs in seconds with no permanent alteration to weapon or gunsmithing required. Slide the stock off the buffer tube, place the insert in the buffer tube detent hole directly behind the one you want the stock’s locking pin to engage, then reinstall the stock.