GLOCK OEM Glock 44 Threaded Barrel, 22LR, Barrel Is Threaded in M9 x .75 RH, Comes With .500-28 Adapter and Thread Protector, Only Compatible With the G44 50480 High quality components and precise manufacturing make GLOCK parts ideal for maintaining and upgrading firearms. The durability" reliability and excellent build quality of these parts will ensure years of service you can count on.