SIG MPX Gen 2 30-Round Magazine

The SIG Sauer MPX Gen 2 30-round magazine is the factory-specification feeding device for the MPX K and MPX Copperhead platforms. The Gen 2 design uses a polymer body combined with reinforced steel feed lips and locking lugs, combining light weight with the structural integrity needed to survive rough handling. This magazine is designed specifically for Generation II MPX and KM models; Gen 1 MPX owners should verify magazine compatibility before purchasing.

The 30-round capacity fills the MPX's full-size magazine well and represents the standard combat-ready load for these platforms. SIG's tight manufacturing tolerances mean the magazine feeds reliably from first round to last, with no break-in period required. The gas-piston MPX system is less sensitive to ammunition variation than blowback-operated PCCs, and the factory magazine is tuned to match that system's feeding geometry precisely.

At around $60, the SIG factory magazine is priced at a premium compared to generic 9mm magazines, reflecting the proprietary design. There are no widely available aftermarket alternatives at the same quality level for MPX-pattern magazine wells, making the factory option the practical choice for serious MPX users.