The Glock 17 was one of the first polymer framed high capacity pistols to gain widespread notoriety in Law enforcement and Militaries around the globe. With lack of external lever style safety, the Glock pistols rely on the "safe action" which consists of trigger safety, internal drop safety and firing pin block safety. All 3 work together and are only disabled when the trigger has consistent rearward pressure till the shot breaks. The Gen4 released several updates to the popluar Glock series of handguns. Larger reversible magazine release for a more left hand friendly gun. Improved dual coil recoil spring extends service life and even decreases felt recoil. The largest noticeable difference and upgrade on the Gen4 Glocks is the rough texture frame and interchangeable backstraps which allow shooters to fit the gun to their preferance. Glock factory night sights upgrade the standard plastic sights typically found on Glock pistols. 3-17rd magazines accompany the Glock 17 Gen4, which gives the Gen4 a standard duty load and is perfect for training classes.