Rock Island Armory M1911-A1 FS .45 ACP Series 70, 5 inch Full-Size 1911 with Custom Compensator, Adjustable Sights, 7+1
This Rock Island Armory M1911-A1 FS is a full-size, Series 70 .45 ACP 1911 configured with practical upgrades for control and visibility. It features a stainless bushing-style multi-ported compensator, target-style adjustable sights with a red fiber-optic front, and layered black/white textured grip panels with a wrap-around finger-groove sleeve. Built on a 4140 steel frame with a forged 4140 slide and a matte dark finish, it combines proven construction with thoughtful enhancements.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in solid shape. It shows various cosmetic imperfections including scratches, blemishes, and areas of finish loss.
What's Included
- 1x 7-round magazine
- Stainless multi-ported barrel-bushing-style compensator (installed)
- Rubber wrap-around finger-groove front-strap sleeve (installed)
- Textured black/white two-piece grip panels (installed)
This full-size RIA 1911 is chambered in .45 ACP and built on the Series 70 firing system. It runs a 5 inch barrel and a single-action trigger with a 7+1 capacity, pairing classic 1911 operation with user-focused upgrades. The frame is marked "M1911-A1 FS," and the barrel hood is stamped "CAL. 45 ACP."
Construction is robust, with a 4140 carbon steel frame and a forged 4140 steel slide in a matte dark finish. The slide uses rear-only vertical serrations for positive manipulation while keeping the profile clean. Safety features include a grip safety and a left-side thumb safety.
Target-focused sighting is provided by a fully adjustable rear sight and a dovetailed red fiber-optic front blade. This setup delivers a crisp, high-contrast sight picture suitable for precise adjustments.
Practical enhancements include a stainless, multi-ported bushing-style compensator to help manage muzzle rise, plus a rubber wrap-around finger-groove sleeve for added control on the front strap. A skeletonized, lightened trigger and a skeletonized commander/rowel-style hammer complete the setup. Import/manufacturer marks read "APINTL – PAHRUMP NV" and "PHILIPPINES."