Rock Island Armory 1911 EFS Series 70, .460 Rowland Conversion, 5 in Threaded Barrel with Two-Port Compensator, Full-Size, Matte Silver
This Rock Island Armory 1911 EFS Series 70 stands out with an authentic .460 Rowland conversion barrel and two-port compensator installed, combining Series 70 simplicity with a purpose-built high-performance caliber setup. It features a matte silver steel frame and slide, ambidextrous controls, textured G10-style grips, and low-profile fixed sights. Marked with the RIA crest and EFS stamp, imported by APINTL (Pahrump, NV) and manufactured in the Philippines by Armscor, it comes with its original case, manual, and a Wilson Combat 8-round magazine.
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 with cosmetic imperfections, scratches, blemishes, and areas of finish loss.
What’s Included
- Original case
- Original manual
- Authentic 460 Rowland conversion barrel with two-port compensator (installed)
- 1x 8-round Wilson Combat 1911 single-stack magazine
The installed .460 Rowland conversion is identified by barrel hood/chamber markings showing ".460 Rowland" with "45 ACP," and a compensator face marked "AUTHENTIC 460 ROWLAND." The cartridge was engineered to deliver .44 Magnum ballistic performance from standard .45 ACP platforms such as the 1911. It shares the same .451-inch bullet diameter, rim dimensions, and overall cartridge length as .45 ACP, allowing use of standard .45 ACP magazines and standard 1911 breech faces and extractors.
This full-size Government-pattern EFS, Series 70 pistol retains classic single-action operation with an ambidextrous thumb safety, a beavertail grip safety with memory bump, and a skeletonized commander-style hammer. A skeletonized three-hole trigger with an overtravel screw provides a crisp, tunable break, and the smooth front strap pairs with a flat mainspring housing for a familiar 1911 feel.
The steel slide and frame wear a uniform matte silver finish. Functional slide details include front and rear cocking serrations, a lowered and flared ejection port, and dovetailed sight cuts. Low-profile fixed sights (dovetailed front blade and rear notch) offer a clean, snag-resistant sight picture suited to the Government-length top end.
The Government-length 5-inch barrel is extended and threaded to accept the two-port compensator. Gray textured synthetic G10-style grip panels aid control. Identifying marks include the Rock Island Armory crest on the slide and EFS stamp on the left frame, with import and manufacture markings "APINTL–PAHRUMP NV" and "ACP PHILIPPINES." Not California compliant as configured.