The Rock Island 1911 GI Standard CS is a compact single-action .45 ACP pistol with a 3.25-inch barrel, 7-round (6+1) capacity, and a black parkerized finish. It weighs 37.7 ounces and has an overall length of 7.13 inches. 
 

Key Specifications 

• Caliber: .45 ACP 
• Barrel Length: 3.25 inches 
• Capacity: 7 rounds (6+1) 
• Weight: 37.7 ounces 
• Action: Single Action Only (SAO) 
• Manufacturer: Rock Island Armory 
• Model Number: 51416 
   

Detailed Features 

The GI Standard CS follows the original 1911 GI specification with a single-action trigger, grip safety, thumb safety, and beavertail. Fixed sights work for quick target acquisition at defensive distances. The black parkerized finish resists corrosion without the shine of polished blued steel. 
 
At 3.25 inches the barrel is shorter than a standard Government-length 1911, making it more compact for concealed carry while retaining the .45 ACP chambering. The alloy frame keeps weight reasonable for a metal-framed pistol.

Users who pick the Rock Island CS generally do so for the 1911 platform in a more compact package. The GI-spec design is straightforward — no frills, no adjustable sights, which some buyers want and others find limiting. Build quality gets positive marks and range reliability is described as solid.

Accuracy is rated well for the size. The main criticisms are the 7-round capacity, which is low compared to double-stack options, and the weight at 37.7 oz, which is heavier than comparable polymer-framed compacts. Value for the price is consistently praised as the strongest selling point.