Description
This is the factory Colt 1911 9mm 10-round magazine built to deliver the capacity and durability you'd expect from a genuine Colt product. Constructed from stainless steel throughout, it resists corrosion and handles heavy use at the range or in the field. The bumper pad on the base helps absorb impact during drops while making reloads feel smoother in your hand.
The high-tensile steel spring and stainless steel follower work together to keep rounds feeding consistently without any hiccups. You'll notice the precision-cut witness holes numbered along the side, which let you check how many rounds are left at a glance without removing the magazine. It's a small detail that saves time when you're cycling through mags.
Whether you're stocking up on backup magazines for your Colt or looking to match capacity across your 1911 arsenal, this magazine fits Government and Commander models that chamber 9mm. The stainless finish keeps things looking clean, and the build quality is what you get when ordering straight from the manufacturer.
Key Specifications
- Manufacturer: Colt
- Manufacturer Part Number: SP300733-RP
- UPC: 098289900562
- Caliber: 9mm Luger
- Capacity: 10 rounds
- Magazine Size: Full Size (Government and Commander)
- Material: Stainless Steel
- Finish: Stainless Steel
- Base Pad: Polymer bumper pad
- Spring: High-tensile steel spring
- Follower: Stainless steel
- Witness Holes: Numbered for round count visibility
What’s Included
- Colt 1911 9mm 10-round magazine
Frequently Asked Questions
Will this 10-round magazine work in my Colt 1911 Commander?
Yes, this magazine is designed to fit both Government and Commander model 1911 pistols chambered in 9mm. The full-size magazine body works with both frame sizes, though it will stick out slightly from a Commander frame due to the longer magazine relative to the shorter slide.
What's the difference between this and the 9-round version?
The main difference is capacity. This 10-round magazine takes advantage of the smaller diameter of 9mm rounds compared to .45 ACP, allowing one extra round. Both use the same quality stainless steel construction and witness holes, so you're getting the same durability and reliability.
How do the numbered witness holes work?
The side-facing holes are numbered so you can quickly see how many rounds are loaded without removing the magazine. Just glance at the numbered holes and the level of rounds visible inside tells you your current capacity at a glance, which is helpful during reloads or when managing multiple mags at the range.
Why does this magazine have a bumper pad?
The polymer bumper pad serves two purposes: it makes reloading feel smoother by providing better grip and purchase when inserting the mag, and it absorbs impact if the magazine drops on hard surfaces. This extra protection extends the life of the magazine body.
Is this a genuine Colt factory magazine?
Yes, this is an OEM factory Colt magazine built to the same specifications as those shipped with new Colt 1911 pistols. It's manufactured by Colt and carries their full product support.





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