Glock 21 Gen 4
This expert review by Military Arms Channel provides a deep dive into the Glock 21 Gen 4, comparing it extensively with the Glock 21 SF. The instructor, Tim, offers an objective assessment, highlighting the Gen 4's dual recoil spring, modular backstraps, and improved magazine release. He also discusses practical aspects like barrel compatibility, the use of aftermarket barrels for lead reloads, and accuracy testing, concluding that the Gen 4 offers reliable combat accuracy.












