The GLOCK 17 Gen5 9mm Semi-Auto Pistol is the size and caliber that started it all for GLOCK. This is the 5th generation of the legendary polymer pistol. It's the choice firearm of many law enforcement agencies worldwide. The G17 comes with the same popular upgrades of all Generation 5 GLOCK pistols like the Glock Marksman Barrel and overall elimination of leaf springs, which have since been replaced by new coil spring designs for increased longevity and reliability. The slide release is ambidextrous and the magazine catch is reversible. The slide has factory serrations on the front and back.