Description
The CMC Power Mag RPM is engineered from laser-welded stainless steel with a black fluoropolymer finish, making it a solid choice for shooters who want their magazines to last. The real innovation here is the dual-wall feed rail design. Instead of traditional thin, bendable feed lips, these rails are built to be at least twice as strong, which means you're getting a magazine that won't warp or crack from regular use. That added strength also creates a smooth, rounded feeding surface that guides rounds up without snagging.
The Railed Power Mag Design Sets It Apart
This magazine holds 8 rounds of .45 ACP and fits full-size 1911 Government models. What makes the RPM different is the patented follower and the way the rails are constructed. The follower stays centered without wobble, preventing the kind of tilt that can cause feeding problems. CMC also included numbered witness holes on the side so you can see your round count at a glance, and the removable polymer baseplate makes it quick to take apart and clean.
Built for Real Shooting
The spring is a heavy-duty rocket wire design that creates consistent tension without sacrificing capacity. Whether you're running it at the range, in competition, or for defensive use, the construction feels rock-solid. The smooth finish makes loading and unloading easy, and the overall assembly gives you the confidence that comes from quality materials and tight tolerances.
American Made and Reliable
This is 100% American-made, built by CMC Products (Chip McCormick Custom), which has been making magazines since 1986. They stand behind every RPM with a satisfaction guarantee. If you've had issues with magazines that wear out or develop feed problems over time, the reinforced design of this mag should put those worries to rest.
Key Specifications
- Caliber: .45 ACP
- Capacity: 8 rounds
- Fit: 1911 Government full-size
- Body Material: Laser-welded stainless steel
- Finish: Black fluoropolymer
- Feed Rails: Dual-wall design
- Spring Type: Rocket wire steel spring
- Follower: Patented RPM design
- Baseplate: Removable polymer
- Witness Holes: Numbered, side-facing
- Manufacturer: CMC Products
- Model Number: M-RPM-45FS8-B
- UPC: 750958734716
What’s Included
- 1x CMC Power Mag RPM 8-round .45 ACP magazine
- 1x Removable polymer baseplate
Frequently Asked Questions
Will the CMC Power Mag RPM fit my Government 1911 pistol?
Yes, this magazine is designed specifically for full-size 1911 Government models. Most Government-length (5.0 inch) and Commander-length (4.25 inch) 1911 pistols will accept this magazine. The full-size grip measurements are 3.0625 inches center-to-center between grip screws, which is the standard for Government models.
What makes the dual-wall feed rails different from regular magazine lips?
Traditional 1911 magazine feed lips are a simple 90-degree bend that's thin and prone to warping or bending with use. The CMC RPM uses dual-wall rails that are bent over at sharp angles, creating a much thicker and stronger feeding surface. This design is at least twice as strong and provides a smooth, rounded surface for cartridges to slide under without snagging.
Can I easily clean and maintain this magazine?
Yes. The removable polymer baseplate slides off easily once you press in the detent, allowing quick access to the inside for cleaning and lubrication. The overall construction makes field stripping straightforward if needed.
What's the numbered witness holes feature?
These are small holes along the side of the magazine body that are numbered 1 through 8, letting you visually count how many rounds are loaded without having to open the magazine or guess. They're positioned on both sides for visibility from either hand.






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