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The MTX 365 .380 magazine extender is built for owners of the SIG P365 .380 ACP who want more capacity without swapping platforms. It converts your factory 10-round .380 magazines into 13-round magazines, adding three critical rounds to your magazine along with a noticeably fuller grip.
XTech Tactical engineered this extension to work with SIG's inward-facing magazine tabs where competing designs simply won't fit. The housing wraps around those tabs seamlessly, giving you clean integration without compromising the firearm's aesthetics. No weird protrusions or awkward profiles.
The extended magazine body brings your grip length up to match what you'd get from a P365X/XL frame, except you keep your compact P365. This matters for control and confidence when shooting. The pinky extension is substantial enough to actually make a difference in your firing hand positioning. You get that fuller feel every time you reach for your gun.
XTech paired a custom-engineered 17-7 stainless steel spring specifically tuned for the .380 platform. This isn't a borrowed design from the 9mm line. The spring was designed from the ground up for your P365 .380, guaranteeing last-round bolt hold open and feeding reliability through all 13 rounds. Installation is straightforward with tools you probably already have, and the kit includes a QR code for an installation video if you want visual guidance.
Yes, this extension is designed specifically for the P365 .380 factory 10-round magazines. It will not work with 12 or 15-round magazines, P365X, P365XL, or P365 Macro frames. Make sure you have the standard P365 .380 frame to avoid compatibility issues.
No, the custom-engineered spring was built specifically for the .380 platform to guarantee unmatched reliability and last-round bolt hold open. Users consistently report feeding flawlessly through all 13 rounds at the range with no malfunctions.
Installation involves field-stripping the magazine and swapping the spring and follower, which most people learn on the first one. The kit includes a detailed QR code video guide that walks you through the process. Some users report the second magazine takes just a few minutes once you've got the technique down.
The extended magazine brings your grip length to match what you'd get from the P365X/XL frame, so you get that fuller feel without switching pistols. It won't give you the longer slide or other frame changes, but it solves the pinky extension and grip control most people want from the larger models.
| UPC | 856822007150 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | XTT132-BLK P365 380 |
| Model | |
| Style | Extension |
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