SIG SAUER P320/P250 Compact .40 S&W 13-Round Magazine

SIG SAUER P320/P250 Compact .40 S&W and .357 SIG 13-Round Magazine

This factory SIG SAUER magazine is designed for compatible Compact-size P320 and P250 pistols chambered in .40 S&W or .357 SIG. It provides a 13-round capacity in a double-stack configuration and serves as a direct spare or replacement magazine for the supported pistol, caliber, and frame-size combination.

The exact item is SIG SAUER part number MAG-MOD-C-43-13, with UPC 798681505128. SIG SAUER lists this model for the P320 and P250 in Compact and Compact X sizes. Those identifiers are important because magazines from the same modular pistol families can differ by caliber, capacity, grip-module length, and baseplate configuration.

Factory Construction

The magazine uses a steel body with a black finish, a polymer baseplate, and side witness holes. The witness holes provide a quick visual reference for the number of cartridges loaded. A polymer follower and internal spring guide cartridges through the magazine body toward the feed lips as the pistol cycles.

Factory magazines are manufactured to SIG SAUER’s intended dimensions for magazine-catch engagement, feed height, and fit within the supported grip module. This does not eliminate the need for a function check, especially when a pistol has an aftermarket grip module, magazine well, baseplate, or other modification.

Two-Caliber Compatibility

This model is listed for both .40 S&W and .357 SIG. The two cartridges use compatible magazine geometry in the supported SIG SAUER platforms, but the firearm itself must be correctly configured and chambered for the ammunition being used. Never select ammunition solely by the markings on a magazine. Confirm the pistol’s barrel and slide markings, manufacturer documentation, and current configuration before loading.

The Compact-length design is intended for compatible Compact and Compact X grip modules. It should not be assumed to fit flush in every P320 or P250 grip size. Full-size, Carry, subcompact, and aftermarket configurations may have different dimensional or baseplate requirements. Compare the exact SIG SAUER part number with the firearm or grip-module documentation before ordering.

Inspection and Maintenance

Before first use, inspect the feed lips, body, follower, spring tension, and baseplate. With the firearm unloaded and pointed in a safe direction, insert the empty magazine to confirm positive engagement and normal release. Load only the stated 13-round capacity and test the magazine with the specific pistol at a controlled range before depending on it for defensive use.

Keep the magazine clean and dry. Dust, unburned powder, and debris inside the body can restrict follower movement. If disassembly is required, follow SIG SAUER’s instructions and control the baseplate and spring during removal. Use lubricant sparingly because excess oil can collect residue and contaminate ammunition. Remove a magazine from service if it is dented, cracked, severely corroded, or repeatedly causes feeding problems.

Product Details

• Manufacturer: SIG SAUER
• Compatible models: P320 and P250 Compact/Compact X
• Calibers: .40 S&W and .357 SIG
• Capacity: 13 rounds
• Magazine type: Double-stack detachable magazine
• Body: Steel with black finish
• Baseplate: Polymer
• Witness holes: Side witness holes
• Part number: MAG-MOD-C-43-13
• UPC: 798681505128

This listing includes one magazine. Ammunition and firearm are not included. Magazine-capacity laws vary by jurisdiction; confirm that this 13-round magazine is legal to purchase, possess, and use in your location before ordering.