Glock Threaded Barrel Glock 44. 22 LR Glock 44 pistol that supports the use of a suppressor. Includes- M9 x .75 RH threaded barrel .500-28 adapter included and thread protector. Note- only compatible with the G44. Specifications for Glock 50480 Threaded Barrel Glock 44: Manufacturer: Glock Finish: Black Gun Make: Glock Gun Model: Glock 44 Condition: New Package Contents: Glock 50480 Threaded Barrel Glock 44 What firearm models does the manufacturer say Glock 50480 Threaded Barrel Glock 44 is compatible with? The manufacturer says that Glock 50480 Threaded Barrel Glock 44 is compatible with Glock 44Glock 50480 Threaded Barrel Glock 44