SIG SAUER P365 9mm 25-Round Magazine – Black

SIG SAUER P365 25-Round 9mm Magazine – Black

The SIG SAUER P365 25-round magazine gives compatible 9mm P365 pistols a substantial capacity increase in a genuine factory configuration. Identified by manufacturer part number 8901941, this extended magazine combines a durable steel body with a black baseplate shaped for P365-XMACRO-size grip modules. It is a practical choice for extended range sessions, structured training and competition stages where fewer reloads can keep the shooter focused on the drill.

Unlike an aftermarket conversion or add-on extension, this is a complete SIG SAUER factory magazine. Its feed geometry, follower and spring system are engineered as a unified assembly for the P365 platform. The 25-round capacity also provides a useful companion to lower-capacity carry magazines when the goal is practice volume rather than minimum overall size.

Factory Magazine Construction

The magazine uses a steel body with a protective dark finish and a polymer baseplate. Rear witness holes allow the user to check approximate loading status without unloading the magazine, while the orange follower is easy to identify when the magazine is empty. These details make administrative handling and range organization more straightforward.

The extended body necessarily projects below the pistol grip. The black baseplate is designed to seat neatly against P365-XMACRO-size grip modules, including configurations such as the XMACRO, AXG LEGION, FUSE and DH3. SIG SAUER also identifies the magazine as compatible with the broader family of 9mm P365 pistols, including the standard P365, P365X and P365XL. Grip fit and the amount of exposed magazine body will vary by frame size.

Useful for Training and Competition

A 25-round magazine can reduce interruptions during practice sessions involving repeated strings, movement drills or multiple targets. It can also simplify equipment planning for competition or recreational range days by providing more ammunition per loaded magazine. Shooters should still practice reloads and malfunction-clearance procedures with the magazines they normally carry, but the extended magazine is a convenient option when capacity and practice efficiency are the priority.

• Caliber: 9mm Luger
• Capacity: 25 rounds
• Body: Steel with dark protective finish
• Baseplate: Black polymer extended baseplate
• Follower: High-visibility orange
• Loading reference: Rear witness holes
• Platform: SIG SAUER P365 family
• Manufacturer part number: 8901941
• UPC: 798681729746

Fit, Loading and Care

Before use, confirm that the magazine locks securely in the specific pistol and drops free as expected. New high-capacity magazines can have strong spring tension; load cartridges carefully and do not exceed the stated capacity. Function-check the magazine with the intended pistol and ammunition before relying on it for serious use.

Keep the feed lips, follower path and magazine body free of dirt, excess lubricant and impact damage. Inspect the baseplate for secure attachment and retire any magazine that shows cracked components, deformed feed lips or recurring feeding problems. Because this is an extended 25-round design, it changes the pistol’s overall height and may not fit holsters or storage cases configured around a flush magazine.

This listing is for one black SIG SAUER P365 25-round 9mm magazine. Firearm and ammunition are not included. Magazine-capacity restrictions vary by jurisdiction; purchasers are responsible for confirming that possession and use are lawful where they live.