Description
This factory SIG SAUER magazine provides extended capacity for P365-series pistols with an emphasis on reliable feeding and factory fit. It holds 21 rounds and is built with a steel body finished in black oxide and a coyote tan polymer baseplate. The magazine includes rear-facing witness holes and an orange anti-tilt polymer follower to aid visual and tactile round-count checks. It ships as the standard 21-round magazine with select P365-FUSE and X-MACRO configurations and is compatible with other 9mm P365 models.
Key Specifications
- The magazine capacity is 21 rounds.
- Caliber is 9mm.
- Compatible with all 9mm P365 models, including P365, P365X, P365-XL, P365-XMACRO, P365-AXG LEGION, and P365-FUSE.
- The magazine body is constructed from steel.
- The exterior finish is black oxide.
- The baseplate is a coyote tan polymer design sized for X-MACRO/FUSE/AXG modules.
- The follower is an orange anti-tilt polymer follower for reliable feeding and visibility.
- Includes rear-facing witness holes for quick visual round count confirmation.
- The magazine employs a double-stack layout to achieve extended capacity.
- Package shipping weight is approximately 0.4.
Whether used for everyday carry setups, range sessions, or competition where additional capacity and reliable function are priorities, this factory Sig Sauer extended magazine delivers a precise fit and established materials. Its combination of a steel body, anti-tilt follower, and clear witness holes offers practical utility without fuss, while the coyote baseplate provides a subdued aesthetic that integrates with multiple grip module sizes.






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