The end plate is one of the most over looked parts when it comes to upgrading your rifle. After all, that simple hunk of forged metal does a perfectly good job of holding your takedown pin detent and spring in place and providing material to stake your castle nut. Forward Controls Design wasn't content to leave well enough alone, however and offers the End Plate, Sling Adapter, Forward Controls Design now available in heavy duty 4140 chrome moly steel.