Our .45ACP 3 Lug Adapter features our patented Go/No Go Gauge. The No Go/Go Gauge provides confirmation that your suppressor is properly attached, for a surprise-free shooting experience. This 3 Lug Adapter is compatible and used in conjunction with our .45ACP 3 Lug Mount. *We recommend using Red LoctiteA(R) or RocksettA(R) and 20-25 ft-lbs to torque the 3 Lug Adapters onto your barrel.