Caliber/Thread Pitch: 45 ACP - 9/16x24 - Thread our 3-Lug Muzzle Device on your barrel and attach your suppressor with our 3-Lug Mount. - Compatibility Note: The 9mm 3-lug muzzle devices only interface with the 9mm 3-lug mount. The 45 ACP 3-lug muzzle devices only interface with the 45 ACP 3-lug mount.
