Rock Island Armory M1911-A1 CS GI Standard .45 ACP Compact 1911, Parkerized, 3.75 in Barrel, 7+1
This Rock Island Armory M1911-A1 CS GI Standard is the compact .45 ACP variant built on the classic 1911 platform with true GI-style features. It pairs a Parkerized 4140 steel frame and slide with a button-rifled 3.75-inch barrel, GI-pattern fixed sights, and traditional controls. Marked "M1911-A1 CS" to denote the compact/officer-size configuration, this example is import-marked from Pahrump, NV and comes with a 7-round magazine.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Shows light handling marks consistent with prior use. Please refer to the photos for close-up views of surfaces and markings.
What’s Included
- Rock Island Armory M1911-A1 CS GI Standard pistol
- 1x 7-round steel single-stack .45 ACP magazine (marked .45 ACP)
The "CS" frame marking identifies this as Rock Island Armory’s compact/officer-size take on the 1911, chambered in .45 ACP with a 7+1 capacity. It is part of the GI Standard series, featuring the classic appointments and dimensions associated with GI-pattern 1911s.
Construction is all-steel with a 4140 steel frame and slide, both finished in a Parkerized coating. The slide has rear-only, vertical serrations for a traditional look. Controls include a manual thumb safety and a grip safety, a checkered magazine release, a short, solid GI-style trigger, and an exposed hammer. Smooth hardwood grips complete the GI aesthetic.
The compact barrel is button-rifled and uses a standard 1911 barrel bushing and short recoil spring plug. The barrel length on this example is noted as 3.75 inches; factory catalog specification for the GI Standard CS is listed at 3.6 inches.
Sights are fixed GI pattern, with a staked narrow-blade front and a small square-notch rear. The pistol bears import markings "APINTL PAHRUMP NV PHILIPPINES," reflecting production by Armscor in the Philippines. Manufacturer part number is 51416.