SIG SAUER MCX/M400 Gen M2 PMAG 30-Round Magazine

SIG SAUER MCX/M400 Gen M2 PMAG 30-Round Magazine

This SIG SAUER-listed Magpul Gen M2 PMAG is a 30-round polymer magazine for 5.56 NATO and .223 Remington ammunition. Designed around the established AR-15 magazine pattern, it is an appropriate factory-accessory choice for compatible SIG MCX and M400 rifles as well as other firearms that accept standard AR-15 magazines.

This listing is for SIG SAUER manufacturer part number 8900008, UPC 798681618132. SIG identifies it as a black Magpul Gen M2 PMAG with a 30-round capacity. The actual magazine may differ slightly from the representative product image.

Proven AR-Pattern Magazine Format

The PMAG design uses a one-piece polymer body to reduce weight and resist dents that can affect some metal magazine bodies. Its molded external shape provides positive handling during loading and magazine changes, while the removable floorplate allows maintenance according to the manufacturer’s instructions. The magazine is intended to feed compatible 5.56 NATO and .223 Remington cartridges through rifles built around the standard AR-15 magazine interface.

Key Features

• Magpul Gen M2 PMAG supplied as a SIG SAUER rifle accessory
• Compatible with SIG MCX and M400 rifles that use standard AR-pattern magazines
• Also suitable for compatible AR-15-pattern firearms
• Caliber compatibility: 5.56 NATO and .223 Remington
• Capacity: 30 rounds
• Black polymer body
• Non-windowed configuration
• Detachable box-magazine design
• Quantity: one magazine

Compatibility Check

Confirm that the firearm accepts standard AR-15-pattern 5.56/.223 magazines before ordering. Some specialized rifles, caliber conversions, lower receivers, and magazine-well configurations may use a different magazine design even if the firearm has a similar appearance. Always consult the firearm manufacturer’s manual when compatibility is uncertain.

Loading and Function Testing

Inspect the magazine body, feed lips, follower, spring action, and floorplate before use. Load only compatible factory-specification ammunition and do not exceed the 30-round capacity. With the firearm unloaded and pointed in a safe direction, verify that the magazine inserts, locks, releases, and drops free correctly. Function-test every magazine with the individual rifle before depending on it for serious use.

A compatible loading tool can make repeated loading easier, but cartridges should never be forced past unusual resistance. If feeding becomes inconsistent, stop using the magazine until it has been inspected and cleaned.

Care and Storage

Keep the magazine free of sand, dirt, excessive carbon residue, and other debris that may interfere with follower movement. Follow Magpul’s instructions before disassembly. Use cleaning products compatible with polymer and apply lubricant sparingly, since excess oil can collect grit. Store the magazine away from excessive heat and replace it if the body, feed lips, or floorplate becomes damaged.

Legal Considerations

This is a 30-round magazine and is restricted in some jurisdictions. Buyers are responsible for confirming that purchase, possession, and delivery are legal at the destination. Store policy and shipping restrictions may apply even when other accessories can be shipped there.

For a compatible SIG MCX, M400, or AR-15-pattern rifle, SIG SAUER part 8900008 offers a lightweight, widely recognized Gen M2 PMAG with 30-round 5.56/.223 capacity.