SOLD (1) Storm Lake Glock 17 9MM Barrel Threaded - Isonite QPQ (Used) Thread Pitch 1/2"x28 - Most Common 9MM Attachment Thread Pitch Storm Lake Glock 17 9MM Barrel Threaded - Isonite QPQ (Used). Threads are in great condition, some wear on exterior and barrel shot count of roughly 5,000 rounds...