Designed to balance out your AR-15, the Martin Wedge Weight works on AR-15 stocks with a cleaning accessory hole. Easy to install, takes minor filing to achieve a precision fit. Approximate weight of the wedge is 3.5 lbs. It can be cut down to adjust to your specific needs. Remember to cut from the front only. Match Rifle Stock weight has a hole drilled for adjustable buttplates.
Sinclair, Issue:4B, Page:220