Glocks G34 Gen5 MOS features an extended barrel and greater slide dimensions making it a favorite among sport shooting competitors. Design enhancements include the Glock Marksman Barrel (GMB) which delivers increased accuracy with enhanced polygonal rifling and an improved barrel crown no finger grooves ambidextrous slide stop levers for better versatility and control and an nDLC finish which is a tougher and more durable finish that is exclusive to the Glock manufacturing process. This FS model has a black finish front slide serrations adjustable sights and a 17-round capacity. It features the Modular Optic System (MOS) to simplify mounting of popular optics without costly custom machining of the pistols slide.