Description
If you run a 9mm 1911, having quality factory magazines makes a real difference. This Colt Government/Commander magazine is built to the same exacting standards as the originals that came with Colt pistols, using laser-welded stainless steel that shrugs off corrosion and rough handling.
The design centers on proven features that work. You get a flat steel baseplate, a high-tensile spring, and a steel follower positioned to feed rounds smoothly through the magazine lips and into the chamber. The numbered witness holes let you visually confirm your round count at a glance, and the precision-machined feed lips are reinforced to provide that snug, secure fit that keeps everything aligned during feeding cycles.
Full-Size Magazine for Colt 1911 Models
This magazine fits both Government and Commander frame 1911s in 9mm. Both models use the same size grip frame and magazines, so whether you own a Government or Commander, this magazine works out of the box. The full-size dimensions mean it'll seat properly and lock securely in your pistol without rattle or movement.
Stainless Steel Construction for the Range and Beyond
Laser-welded stainless steel means no rust creeping up on you if you're shooting in humid conditions or storing mags long-term. The material also holds up better to occasional drops or rough treatment compared to some alternatives. The flat baseplate stays durable, and the overall crushproof design resists damage from heavy handling.
Key Specifications
- Manufacturer: Colt
- Manufacturer Part Number: SP945381-RP
- UPC: 098289900609
- Caliber: 9mm Luger
- Capacity: 9 rounds
- Magazine Type: Single-stack
- Construction Material: Stainless steel (laser-welded)
- Baseplate: Flat steel
- Follower: Stainless steel
- Spring: High-tensile steel
- Compatibility: Colt 1911 Government and Commander full-size models
- Length: 10.5 inches
- Finish: Stainless
- Weight: 0.2 lbs
What’s Included
- 1x Colt 1911 9mm 9-round magazine
Frequently Asked Questions
Will this Colt 9mm magazine work in both Government and Commander models?
Yes. Both Government and Commander 1911 pistols use the same full-size grip frame and take the same magazines. This magazine works in either platform without any issues.
What makes the stainless steel construction better than other options?
Stainless steel naturally resists corrosion and rust, which is especially useful if you shoot in humid conditions or store your magazines for extended periods. The laser-welded construction also makes it more durable and resistant to damage from drops or heavy handling compared to some cheaper alternatives.
Can I load this magazine to full capacity safely?
The magazine holds 9 rounds as designed. Many shooters prefer to load 8 rounds in 9mm 1911 magazines to reduce spring pressure and improve reliability, but this magazine is engineered to handle all 9 rounds reliably. Your own experience with your specific pistol will guide the best practice.
How do the numbered witness holes help?
The witness holes drilled along the side of the magazine let you quickly count rounds by sight without removing the magazine from your gun. This is useful for verifying your mag load at the range or before carrying.






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