GEMTECH again makes the pieces fit: Our Adapter will allow you to mount most any suppressor or muzzle accessory using 1/2-28 U.S. standard threading onto the SIG SAUER or German Sport Guns .22lr 1911 handguns. The GEMTECH .22 1911 adapter is precision made to ensure alignment to avoid dangerous baffle strikes.
Installation is simple: All you need to convert your pistol is to remove the original barrel cap from the pistol using the factory wrench, and then tighten our adapter in its place (we suggest applying locktite for a semi-permanent install).
Price includes a knurled thread protector for when you aren’t using your suppressor (suppressor / gun not included).
The adapters have a dark, blued protective finish, and are threaded in M9x .75 to 1/2-28.”
NOTE: This item is not compatible with the COLT/UMAREX 1911/22. That pistol requires the Walther P22 adapter.