The Quarter Circle 10 GSF (Glock Small Frame) is an AR-pattern 9mm PCC built on QC10's dedicated lower receiver with Glock magazine compatibility. QC10 focuses exclusively on pistol-caliber AR components and offers one of the most refined 9mm AR feeding systems available. Type: Rifle Action: Semi-Automatic Caliber: 9mm Capacity: 33 Year introduced: 2014, USA Weight: 64 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Competition PCC, Law Enforcement