SIG SAUER P322 .22 LR 25-Round Magazine

SIG SAUER P322 .22 LR 25-Round Factory Magazine

Add extended rimfire capacity to a compatible P322 with this genuine SIG SAUER 25-round magazine. Built for the P322 pistol and chambered for .22 Long Rifle, it gives range shooters five additional rounds compared with the platform’s standard 20-round magazine. The black polymer construction, factory follower system, and P322-specific geometry make it a straightforward OEM option for practice, competition preparation, and recreational shooting. This exact version is manufacturer part number 8900746.

Extended P322 Capacity

The magazine holds 25 rounds of .22 LR ammunition and extends below the pistol’s grip to accommodate the additional capacity. It is designed specifically for the SIG SAUER P322, so it should not be treated as a general-purpose .22 LR magazine or assumed to fit other SIG SAUER pistol families. Factory compatibility is valuable when selecting a spare magazine because the body shape, follower, feed presentation, and magazine-catch interface all need to work together with the host pistol.

Loading Assistance and Round Checks

Loading-assist tabs allow the follower to be lowered slightly as each cartridge is inserted. This temporarily reduces follower pressure and helps the shooter place the rimmed cartridges into the stack one at a time. Careful loading is important with .22 LR ammunition: each round should lie in the correct orientation rather than being forced into place. SIG SAUER’s assisted design makes that process more manageable when filling the magazine to its full 25-round capacity.

Side witness holes offer a quick visual reference to the ammunition column. Both the magazine body and baseplate are polymer, a construction that keeps the extended magazine relatively light and provides the molded form required for the P322 platform. The exterior is finished in black to coordinate with the pistol’s standard controls and grip module.

Key Features

• Genuine SIG SAUER factory magazine
• Compatible with the SIG SAUER P322 pistol
• Caliber: .22 LR
• Extended 25-round capacity
• Black polymer magazine body
• Polymer baseplate
• Loading-assist tabs attached to the follower
• Side witness holes for visual ammunition checks
• Manufacturer part number: 8900746
• UPC: 798681657117

Use and Maintenance

Verify the pistol model before loading and test fit the empty magazine to confirm normal insertion, retention, and release. Follow the current SIG SAUER P322 owner’s manual for all handling, loading, unloading, cleaning, and inspection procedures. Do not use the loading tabs to pull the follower down farther than necessary, and do not force a cartridge that is not aligned. Routine inspection should include the feed lips, follower movement, body, baseplate, and magazine-catch area. Remove accumulated fouling and debris according to the manufacturer’s guidance.

Because this magazine holds more than ten rounds, sale or possession may be restricted in some states or localities. Confirm the applicable rules before ordering. One 25-round magazine is included; the P322 pistol and ammunition are sold separately.