M9x.75 to 1/2-28 Adapter & Thread Protector - Sig 1911-22, 5PK-22, GSG 1911-22

For sale is an M9x.75 to 1/2-28 adapter for Sig Sauer 1911 22, GSG 1911 22, 5PK 22 Pistols (as well as some others that have M9x0.75 threads).  This adapter allows these models to utilize the many readily available accessories on the market for the popular 1/2"x28 thread.  Adapter features flat ridges for installation/removal with a wrench and includes a 1/2"x28 thread protector (to protect the 1/2x28 threads for use without an accessory or for storage)  Thread protector features a very attractive fine diamond knurl and looks great.  

Adapter and protector are made of high carbon steel and are finished in black oxide.

Dimensions and Specifications:

Pistol End Thread: M9 (9mm) x 0.75

Adapter OD Thread: 1/2"x28

Overall Length: ~1.25"

Largest Diameter (with protector cap installed): 5/8"