This high-performance GLOCK pistol featuring a long barrel, a well-balanced slide, long sight radius and a slightly lighter trigger pull is made for competition and enables reliable precision. The model G17L Gen5 features MOS technology, enabling effortless mounting of optical sights for faster target acquisition. The G17L Gen5 MOS pistol is designed with an added ambidextrous slide stop lever and the reversable magazine catch to enable optimal handling for both right and left-handed operators. GLOCK 17L Gen5 MOS (for sale).