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This is the genuine OEM magazine for Rock Island Armory's double-stack 1911 A2 pistols in both .40 S&W and 10mm Auto. Since Rock Island pistols in these calibers typically come with just one magazine, having a spare or two on hand makes sense if you're planning any serious range time.
With 16 rounds sitting in this magazine, you get meaningful firepower without jumping to a different platform. The double-stack configuration is what makes this possible. Unlike traditional single-stack 1911 magazines that hold 7-9 rounds, this design uses a parallel feed pattern to pack more ammunition into a package that still works with the standard 1911 frame. Many owners pick up multiple copies specifically because the factory standard is just one magazine per gun.
The magazine body is constructed from steel with a blued finish that matches the traditional appearance of most Rock Island pistols. The key detail here is the heat-treat process applied to the steel, which hardens it for durability through repeated loading and unloading cycles. Inside, a high-tensile steel spring pairs with an anti-tilt polymer follower to keep rounds aligned and feeding smoothly. Numbered witness holes drilled into the side let you verify your round count at a glance without counting on your fingers.
The polymer baseplate makes routine cleaning and maintenance straightforward if you ever need to disassemble the magazine. It also absorbs impact better than metal if the magazine takes a drop. The flush-fit design means nothing catches or hangs when you draw the magazine from your gun. Since this is an Armscor factory magazine built to their exact specifications, the tolerances match what came on your pistol, so there's zero guesswork on fit or function.
Yes, this is a dual-caliber magazine designed to work in both .40 S&W and 10mm Rock Island 1911 A2 pistols. The internal dimensions accommodate both cartridges, so you can use the same magazine in either caliber without any modifications. Just verify your specific pistol model uses the double-stack 1911 A2 frame, as single-stack models won't accept this magazine.
Range sessions, training drills, and even casual shooting go faster and smoother when you're not constantly reloading the same magazine. Having multiple mags loaded and ready lets you focus on your shooting rather than mag management. Most owners find that after their first range trip, a second or third magazine becomes worth its weight in practicality.
No, this is designed specifically for the double-stack A2 configuration. Single-stack Rock Island 1911 pistols use different magazines and won't accept this double-stack design due to frame differences. Confirm your pistol model before ordering.
Heat treatment hardens the steel to resist the repeated stress of loading, feeding, and unloading rounds without warping or losing spring tension over time. This process helps ensure your magazine performs reliably across hundreds of shots without degradation, which is especially important if you shoot competitively or train frequently.
| UPC | 812285021270 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | OEMP164015B |
| Brand Fit | Rock Island |
| Caliber/Gauge | 10mm |
| Capacity | 16 |
| Color | Blue |
| Length | 4.8500 |
| Model | |
| Model Fit | 1911 A2 |
| Package Height | 1.4 |
| Package Width | 3.0 |
| Product Type | Magazine |
| Shipping Weight | 0.19 |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Quantity | 1 |
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