SIG P365 15-Round Extended Magazine

The SIG Sauer P365 15-round magazine is the factory double-stack extended magazine for standard P365, P365X, and P365-XL pistols. SIG brought this SKU back to current production in 2026, restoring the OEM 15-round option that had been difficult to source during the discontinuation window.

The magazine ships with a baseplate configured for the standard P365 grip and includes a second baseplate for P365X and P365-XL setups, so one magazine body covers the common P365 family without leaving a gap at the magwell. A side witness hole stays visible while the magazine is inserted in a standard P365, which makes a full 15-round load easy to verify without dropping the mag.

This is the right pick when you want factory SIG feed geometry, steel construction, and full warranty coverage at 15 rounds. It is not the X-Macro 17-round magazine: SIG lists P365-XMACRO, AXG, and FUSE models as incompatible with this mag. For a lower-cost 15-round alternative, the Magpul AMAG 15 SG9 remains a valid option, but the OEM magazine is back on SIG's catalog and dealer channels.