Tiger Rock AR Accu Wedge Buffer -Black Black. Its low profile and optimal weight balance make it the perfect addition to any build. Does not require a ramp or a stock riser. A solid steel spring and buffer keepers are included with the Accu Wedge. Carbines equipped with a gas block or compensator need a heavier buffer and increased recoil force to adequately function. The Accu Wedge buffer has a two piece steel spring. Standard carbines do not have a crush washer so the spring and internal material must be installed by a seasoned gunsmith. Specifications for Tiger Rock AR Accu Wedge Buffer: Manufacturer: Tiger Rock Condition: New Package Contents: Tiger Rock AR Accu Wedge Buffer Tiger Rock ACCU-B: AR Accu Wedge Buffer -Black Black