The Rock Ultra FS is built in traditional 70-series design and delivered with our top quality production and engineering standards. This pistol is chambered in 45 ACP with a 5 inches button rifled barrel supported by a full length guide rod. Smooth-angled, snag-free style allows for quick draw in fast need situations. Includes a low profile adjustable rear sight and high visibility fiber optic front sight. Also includes skeletonized hammer and trigger with adjustable over travel stop and ambidextrous safety. It's finished with a tough parkerized matte coating and comes with battle ready G10 tactical grips. True to all Rock Island 1911s, the Rock Ultra comes with a crisp, factory 4 to 6 lb trigger to give you a great experience right out of the box.