A muzzle device designed for the Glock 21 pistol redirects propellant gases upward to counteract muzzle rise and recoil. This device typically attaches to the threaded barrel of the firearm, offering enhanced control and faster follow-up shots. A common example is a ported extension that directs gases upward.
Reduced muzzle climb allows for quicker target reacquisition, particularly during rapid firing. This enhanced stability benefits practical shooting competitions and defensive applications. The development of these devices reflects the ongoing pursuit of improved firearm control and accuracy. Historically, similar principles have been applied to larger caliber firearms, and the adaptation to handguns like the Glock 21 demonstrates the continued refinement of these techniques.