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When polymer magazines don't cut it, Magpul's AMAG series steps in. The AMAG 21 SG9 is engineered with a heat-treated stainless steel body and polymer sub-components to deliver the capacity and durability P320 owners need without compromise. This 21-rounder gives you maximum ammunition capacity while keeping the profile practical for full-size pistols.
The magazine features a high-visibility, controlled-tilt polymer follower that keeps rounds consistently aligned as they feed into the chamber. Pair that with a stainless steel spring built for longevity, and you get feeding performance that holds up in high-stress situations. The flared floorplate is removable for easy cleaning, and the entire body resists corrosion for long-term durability. Testing shows these magazines run flawlessly through various ammunition types and withstand drops without issue.
Capacity witness holes starting at 5 rounds make it easy to check your round count at a glance. The paint-pen dot matrix on the floorplate lets you mark and identify your magazines quickly. The controlled-tilt follower prevents the kind of tilting and jamming that causes feeding problems, so the magazine keeps working even during rapid fire or stress-heavy drills. Everything Magpul included serves a purpose—there's no unnecessary bulk.
This magazine works with all P320 and M17 frame sizes: full-size, compact, and sub-compact models. It'll protrude slightly on compact frames, but it seats and functions without issue. If you run a full-size P320 or M17, it sits flush with the grip. Made in the USA, this is Magpul's answer to P320 owners who need metal magazines that match factory performance at a more sensible price point.
Yes, it's compatible with all P320 frame sizes including full-size, compact, and sub-compact variants. On compact models it will protrude below the grip, but it seats and functions perfectly. For flush fit, use it with full-size P320 or M17 pistols.
The P320 has narrow magazine wells that don't leave room for sufficient polymer wall thickness to meet Magpul's reliability standards. Metal construction ensures the magazine fits properly and functions flawlessly in the pistol while maintaining the durability Magpul is known for.
The follower maintains a consistent angle as rounds feed, preventing it from tilting or jamming inside the magazine. This design keeps ammunition properly aligned for smooth, reliable feeding even during rapid fire or tactical situations where magazine performance is critical.
Yes. The floorplate is removable for quick disassembly and cleaning. The stainless steel construction resists corrosion, so routine maintenance is straightforward. The paint-pen dot matrix on the baseplate also makes it easy to mark and identify your magazines.
| UPC | 840815149323 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MAG1465-SST |
| Model | |
| Capacity | 21 |
| Caliber/Gauge | 9mm |
| Color | Silver |
| Product Type | Magazine |
| Quantity | 1 |
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