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The standard 7-round 1911 magazine is a classic, but sometimes you just want a few more rounds before you have to reload. ProMag's COL04 bumps capacity up to 10 rounds for full-size 1911 Government Model pistols chambered in .45 ACP, giving you a meaningful boost whether you're running drills at the range or just want more mag options in your rotation.
The magazine body is built from heat-treated steel with a blued/black oxide finish, which keeps weight reasonable while standing up to the kind of handling that range bags and range sessions tend to dish out. The spring is wound from chrome-silicon wire and heat-treated for strength, so it's not going to go soft on you after sitting loaded for a while. The follower, lock plate, and baseplate are all molded from a DuPont Zytel-based polymer, which is a proven material in the magazine world. Numbered witness holes run along the side so you can do a quick round count at a glance without dropping the mag.
The extended baseplate sticks out past the grip frame, which is expected for a 10-rounder in a single-stack platform. ProMag includes a polymer grip extension sleeve that slips over the tube to fill that gap, giving the magazine a cleaner look and a bit more surface to grab during a reload. It's a thoughtful touch that other budget extended mags sometimes skip.
This mag fits full-size 1911 Government and Commander-pattern pistols from Colt, Rock Island Armory, Springfield Armory, Kimber, Charles Daly, Tisas, and most other standard single-stack 1911 clones. Like all ProMag products, it carries a lifetime warranty and is made in the USA.
Yes, the COL04 is designed for standard single-stack 1911 Government Model pistols, and it works with most 1911-pattern pistols from brands like Rock Island Armory, Springfield Armory, Kimber, Tisas, Charles Daly, and Colt. Some tighter-tolerance pistols may require minor fitting or a break-in period, which is pretty common with aftermarket extended mags in general.
Because this is a 10-round extended magazine in a single-stack platform, the magazine tube extends below the grip frame of the pistol. The included polymer sleeve slips over the lower portion of the tube to fill that gap, giving it a cleaner look and a bit more surface area to grip during a reload. It's removable if you prefer the mag without it.
It's a solid budget-friendly option for range sessions and training where you want extra rounds between reloads without a big investment. The heat-treated steel body and chrome-silicon spring are built to hold up to regular use, and the lifetime warranty gives you some peace of mind. For high-stakes carry use, many people prefer OEM or premium aftermarket mags, but for range days and building up your mag stock, the COL04 is a practical pick.
Yes, it is compatible with Commander-pattern 1911 pistols as well as full-size Government models. Keep in mind the extended baseplate will protrude further below a Commander grip than it would on a Government, but the magazine itself will lock up and feed normally.
ProMag backs the COL04 with a lifetime replacement warranty. If you ever have a problem with the magazine, you can return it to ProMag for a replacement. That kind of coverage is one of the reasons ProMag has become a popular choice for shooters who want to stock up on spare mags without overspending.
| UPC | 708279000096 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | COL 04 |
| Brand Fit | Colt |
| Caliber/Gauge | .45 ACP |
| Capacity | 10 |
| Color | Blue |
| Length | 6.8 |
| Model | |
| Model Fit | 1911 Government |
| Package Height | 1.0 |
| Package Width | 4.9 |
| Product Type | Accessory-Magazines |
| Quantity | 1 |
| Shipping Weight | 0.25 |
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