Other Details Manufacturer: ROST MARTIN Manufacturer Part Number: RM1FBLKOSPT Action: Semi-Auto Barrel Length: 4.5" Barrel Type: Threaded Caliber/Gauge: 9mm Capacity: 17 + 1 Color: Black Finish: Matte Frame: Polymer Frame Finish: Black Grip Material: Interchangeable Backstrap Model: RM1F TACTICAL Product Type: Striker Fired Sights: Fixed Sights Size: Full Size Slide Description: Optic Ready/Serrated Subcategory: Pistols - Polymer Frame