STI manufactures a full range of 1911 pistols based on its modular frame, in addition to single stack 1911s using steel frames in a variety of calibers such as 9mm, 45 ACP, 40 S&W, and .38 Super. STI also manufactures a full line of parts for 1911 pistols, such as modular frame kits (which are used by gunsmiths to build complete guns), slides, barrels, compensators, triggers, hammers, thumb and grip safeties, slide stops, firing pins, guide rods, magazine wells, magazines, and scope mounts. STI's modular frames are marketed under the brand name 2011 (a take on the 1911 name).
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