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Magpul built their reputation on the PMAG, but the P320 platform is designed around a metal magazine, and polymer just doesn't cut it in that magwell. That's the whole reason the AMAG line exists. The "A" stands for alloy, and this 17-rounder for the SIG P320 is the magazine that kicked off the series.
The body is made from heat-treated stainless steel alloy, which gives it serious corrosion resistance and the kind of durability that holds up to hard use, drops, and rough conditions. Polymer sub-components keep the weight manageable, so you're not carrying a brick in your grip. The stainless steel spring is built for longevity and helps maintain consistent feeding round after round without the spring fatigue you sometimes see in cheaper mags over time.
The feature set will feel familiar to anyone who has run a PMAG. There's a high-visibility orange controlled-tilt follower that keeps rounds properly aligned all the way up and also signals empty at a glance. Rear-facing capacity indicator windows start at 5 rounds and count up in single-round increments, so you always know where you stand without dropping the mag. The floorplate is flared and fully removable, making routine cleaning and inspection straightforward. Magpul also carried over their paint-pen dot matrix on the floorplate so you can mark individual mags for easy identification.
Compatibility is broad. The AMAG 17 SG9 works across all full-size, compact, and sub-compact variants of the SIG P320 family, including the M17 and M18. If you're running a Legion, an AXG, or a carry-size P320, this mag drops in and runs. Real-world testing and range reports have confirmed zero-failure performance across 115, 124, and 147-grain 9mm loads, and it drops free cleanly without needing a heavy baseplate to encourage it. This is a well-thought-out magazine from a brand that knows what they're doing.
The AMAG 17 SG9 is compatible with all full-size, compact, and sub-compact variants of the SIG P320 platform, including the M17 and M18. It also works in P320 variants like the Legion and AXG when used with appropriate magwells. As long as you're running a 9mm P320-family pistol, this magazine is a fit.
The SIG P320's magwell is narrower than platforms like the Glock, which leaves very little room for polymer wall thickness while still maintaining reliable feeding. Magpul developed the AMAG line specifically to address this, using a stainless steel alloy body that meets their reliability standards in the tighter magwell geometry of the P320.
The AMAG 17 SG9 has been tested with 115, 124, and 147-grain 9mm loads with flawless results including clean slide lockback on empty and smooth drops free from the magwell. The stainless steel body and Magpul's controlled-tilt follower design give it performance on par with OEM magazines, and many P320 owners run both interchangeably without any issues.
The witness holes start at 5 rounds and continue up the spine of the magazine in single-round increments all the way to 17. The bright orange follower also becomes visible through the windows as you run low, giving you a clear visual cue that it's time to reload.
Yes. The floorplate is flared and fully removable, so you can break the magazine down for cleaning, inspecting the spring, or replacing components. It's a straightforward process and something Magpul recommends as part of normal maintenance for any magazine.
Yes, the AMAG 17 SG9 is designed, engineered, and manufactured in the United States by Magpul Industries. It carries the same quality standards and manufacturing oversight as the rest of Magpul's product lineup.
| UPC | 840815147633 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MAG1331-SST |
| Caliber/Gauge | 9mm |
| Capacity | 17 |
| Color | Silver |
| Model | |
| Product Type | Magazine |
| Quantity | 1 |
| Shipping Weight | 0.198 |
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