The Chip McCormick Custom Railed Power Mag (RPM) is a 1911 Government .45 ACP magazine engineered to solve the feed-reliability problems that plague standard GI mags. Built from stainless steel with laser-welded seams, this 10-round magazine combines durability with the smooth feeding geometry that serious .45 shooters demand. Whether you're running a carry gun, match pistol, or duty 1911, the RPM delivers the dependability you need when it matters.

The heart of the RPM's design is its dual-wall feed-rail system—a reinforced feed-lip architecture that resists the warping, bending, and damage that cause failures in standard magazines. McCormick engineers added extra material to the feed-lip zone, then rolled it inward to dramatically increase rigidity without compromising the smooth surfaces that guide rounds into the chamber. The result is a magazine that feeds reliably under hard use and maintains that performance across hundreds of cycles.

Inside, the RPM uses McCormick's proprietary Rocket Wire spring—a high-tensile design that keeps full round stacks pressing upward with consistent force, eliminating the spring fatigue and follower wear that soften older magazines over time. The stainless-steel tube resists corrosion and salt exposure, while the black polymer base pad is beveled to seat smoothly in tight magwells. Witness holes let you verify round count at a glance. Independent testing confirms the RPM delivers twice the service life of conventional 1911 magazines, making it a genuine upgrade for shooters who expect their gear to last.

Key Features

• Dual-wall feed rails resist bending, warping, and damage for superior reliability
• Stainless-steel tube with laser-welded seams for corrosion resistance and durability
• Proprietary Rocket Wire spring maintains consistent feed pressure through full magazine life
• Beveled polymer base pad fits tight magwells without snags
• Witness holes for quick round-count verification
• Tested to twice the service life of standard 1911 magazines

Specifications

Firearm Compatibility	1911 Government
Caliber	.45 ACP
Capacity	10 Rounds
Material	Stainless Steel (tube); Black Polymer (base pad)
Construction	Laser-welded seams
Brand	Chip McCormick Custom

Frequently Asked Questions

Will the RPM magazine work with all 1911 Government models?

The RPM is designed for 1911 Government .45 ACP pistols. If you own a variant (Officer, Compact, or proprietary frame), verify compatibility with your specific model before purchasing.

What makes the Railed Power Mag more reliable than standard magazines?

The dual-wall feed rails add extra material and rigidity to the feed-lip area, preventing the bending and warping that causes jams in standard magazines. The smooth rail surfaces also encourage consistent, trouble-free feeding under all conditions.

How long will the Rocket Wire spring last?

McCormick's proprietary Rocket Wire spring is designed for high tensile strength and long service life. Independent testing shows the RPM magazine delivers twice the service life of ordinary 1911 magazines.

Does the RPM fit in tight magwells without binding?

Yes. The black polymer base pad is beveled to seat smoothly in tight magwells, and the laser-welded tube has no snags or burrs that could cause insertion or removal problems.