Rock Island 51479 Rock Ultra CS 45 ACP Caliber with 3.50" Barrel, 7+1 Capacity, Overall Black Parkerized Finish Steel, Beavertail Frame, Serrated Slide & Black/Gray G10 Grip • Single Action • Capacity: 7+1 • Finish: Parkerized • Sights: FT: Fiber Optic RR: Tactical Style Adjustable • Barrel length: 3.5 • Overall length: 7.3 • Series 70 Type Firing System/ Guide Rod/ Bull BBLExtended Beavertail Fiber Optic Front Sight LPA MPS1 Type Rear Sight • Single Action • Capacity: 7 + 1 • Finish: Fully Parkerized Frame & Slide • Barrel length: 3.5" • Overall length: 7.13" • 15in Free-Float MLOK Rail/ Ambi Bolt Release