This AR-15 80% lower adjustable universal jig kit works with forged and billet lower receivers. Alignment tool helps center the top plates over the lower receiver. Side plates are laser-etched with right and left markings and drill hole sizes for convenience. Can be used to finish up to 25 lowers. Machined from solid aerospace T6 heat-treated 6061 billet aluminum and hard coat anodized. Includes assembly instructions. MADE IN THE USA
NOTE: Manufacturer's step by step video instructions on finishing an 80% lower with the jig kit.