Description
The feed lips are usually the first thing to go on a 1911 magazine. Thin, exposed, and easy to bend, they cause most of the feeding hiccups you run into at the range. CMC set out to fix that with the Railed Power Mag, better known as the RPM. Instead of standard feed lips, this design uses dual-wall feed rails built right into the tube, which CMC rates at least twice as strong as traditional 1911 feed lips. That means fewer jams from warped or spread lips and a smoother feeding surface for your rounds.
What Sets the RPM Apart From a Standard 1911 Mag
Everything here is built around lasting through hard use. The body is heavy-duty stainless steel with a laser-welded tube, so it holds its shape and shrugs off corrosion whether you're carrying, competing, or just burning through range ammo. Inside, you get 19 coils of high-tensile rocket wire spring driving the patented RPM follower. That follower is alloy-frame safe, so it plays nice with lighter-framed 1911s as well as steel guns.
Loading and Maintaining Your CMC Railed Power Mag
CMC drilled numbered witness holes down the side so you can check your round count at a glance without pulling anything apart. When it's time to clean, the base pad pops off for easy access to the spring and follower, and the smooth outer finish helps the mag drop free and seat back in without dragging. Little things, but they add up over a long day of shooting.
Fit and Capacity for Your Full-Size 1911
This is a 10-round .45 ACP magazine sized for full-size Government model 1911 pistols. If you run a 5-inch 1911 in .45, this is the size you want. It's a solid pick whether you're stocking up on spares for the range, topping off a carry rotation, or just want a mag that holds up better than the factory unit that came with your pistol.
Key Specifications
- Manufacturer: CMC Products (Chip McCormick)
- Model: Railed Power Mag (RPM)
- Manufacturer Part Number: 17150 / M-RPM-45FS10
- UPC: 019962233104
- Caliber: .45 ACP
- Capacity: 10 Rounds
- Fits: Full-Size 1911 Government Model
- Body Material: Stainless Steel, Laser-Welded Tube
- Feed System: Dual-Wall Feed Rails
- Follower: Patented RPM Follower, Alloy-Frame Safe
- Spring: 19 Coils High-Tensile Rocket Wire
- Base Pad: Removable
- Witness Holes: Numbered
- Color / Finish: Silver / Stainless Natural Finish
- Product Type: Detachable Magazine
What’s Included
- One (1) CMC Power Mag RPM 1911 magazine, 10rd .45 ACP
- Removable base pad (installed)
Frequently Asked Questions
Will the CMC Power Mag RPM fit my 1911?
This magazine is built for full-size Government model 1911 pistols chambered in .45 ACP, which typically means a 5-inch barrel gun. Most full-size 1911s use the same magazine length, so if you're running a standard Government frame in .45 you're good to go. If you have a compact or Officer-size 1911, you'll want a shorter magazine instead.
What makes the RPM different from a regular Power Mag?
The big difference is the feed system. Instead of the thin, exposed feed lips found on most 1911 magazines, the RPM uses dual-wall feed rails built into the tube that CMC rates at least twice as strong. That reinforcement is designed to resist the bending and spreading that causes feeding problems over time.
Is the RPM follower safe for aluminum-frame 1911s?
Yes. The patented RPM follower is alloy-frame safe, so it won't chew up the feed ramp or frame on lighter-framed pistols. It works just as well in traditional steel-frame guns, so you don't have to worry about matching the mag to your frame material.
How do I clean the CMC Railed Power Mag?
The base pad is removable, so you can pop it off to pull the spring and follower for cleaning. A stainless magazine like this doesn't need much attention, but the occasional wipe-down keeps grit out of the works. The numbered witness holes also give you a quick way to confirm your round count before you head out.






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