Replaces rear M1-A/AR-15 fixed sling loops with a common sling stud. This is necessary for attaching the Accu-Shot to the M1-A, SR and AR family of rifles. Simple installation requires a Screwdriver. Made of steel. Black only. Made in the U.S.A. Please note the BT03 will not work with the A1 stock due to the shorter length of the A1 stock.