Glock 20SF Gen4 slim-frame 10mm with Gen4 modular backstrap. The most ergonomically adjustable full-size 10mm Glock configuration. Type: Pistol Action: Semi-Automatic Caliber: 10mm Auto Capacity: 15 Year introduced: 2013, Austria Weight: 30.69 oz Overall length: 7.59" Status: Active Intended use: Field, Woods Carry, Hunting