Thread Conversion Adapter M9x0,75 to ½"x 28 TPI (U

GSG Thread Conversion Adapter. from M9x0,75 to ½x28 TPI (UNEF)
Manufacturor: German Sport Guns.

This adapter fits GSG-1911 and Glock 44 pistol

GSG411.01.12 Convert threaded barrel to ½x20 TPI (UNF)
GSG411.01.28 Convert threaded barrel to ½x28 TPI (UNEF)
GSG400.32.12.1 Original Muzzle Cap, (This one you missplace during you use the Conversion Adapter :-) )
GSG402.00.14 Adapter for GSG-15, GSG-16, STG44, Mauser AK47 Omega, Mauser M16, Thred forward 1/2"x20 UNF