Description
The Sig Sauer MPX 35-round magazine combines durability with practical capacity for range work and tactical applications. This factory magazine is the product of a two-year design effort from Sig Sauer to meet their quality standards while pushing capacity beyond earlier 20 and 30-round options.
Construction That Lasts
Built with metal feed lips paired to a lightweight polymer body, this magazine handles the demands of regular use. The design keeps shape retention solid even after hundreds of rounds, and the removable baseplate makes cleaning straightforward. The robust polymer construction resists damage that lighter materials can't handle, while steel feed lips stay reliable where polymer feed lips risk warping and feeding issues.
Designed for Every Generation
This magazine works across all MPX generations without compatibility headaches. Whether you run an early-generation build or the current Gen 2 platform, the same magazine feeds reliably and locks up tight. The aggressive grip texturing on the body improves handling during reloads, and it supports the last-round hold-open function so you know when you're empty.
Practical for the Long Session
The 35-round capacity cuts down reload frequency at the range, which matters when you're running drills or just trying to maximize trigger time. For competition work, training days, or anyone building an ammunition supply, the extra capacity balances firepower with a still-manageable size profile.
Key Specifications
- Manufacturer: SIG SAUER
- Manufacturer Part Number: 8901025
- UPC Code: 798681666997
- Magazine Capacity: 35 rounds
- Caliber: 9mm Luger
- Compatible Platform: Sig MPX (all generations)
- Body Material: Polymer
- Feed Lips: Metal
- Follower: High-visibility polymer
- Spring: High-tensile steel
- Finish: Black
- Magazine Length: 12.5 inches
- Package Weight: 0.3 lbs
What’s Included
- 1x Sig Sauer MPX 35-round magazine
Frequently Asked Questions
Will this MPX magazine work with older generation MPX platforms?
Yes, this 35-round magazine is fully compatible with all MPX generations, from Gen 1 through current builds. Sig designed it for backward compatibility, so you don't have to worry about generation mismatches. If you've got an early-gen MPX, this magazine functions without any issues.
What makes the metal feed lips better than polymer?
Metal feed lips hold their shape over thousands of rounds without degrading. Polymer feed lips can warp with heat and wear, leading to feeding problems down the line. The steel feed lips on this magazine ensure consistent, reliable feeding in any conditions and resist the damage that repeated use can cause.
Can I use this magazine in both MPX carbines and pistol variants?
The MPX magazine works across both carbine and pistol platforms since they share the same magazine well and feed system. Whether you're running a carbine, K variant, or pistol-length build, this magazine feeds reliably across the board.
How does the 35-round capacity compare to standard MPX magazines?
Sig's original MPX magazines came in 20 and 30-round options. This 35-round version gives you five more rounds per magazine, which means fewer reloads during extended range sessions or training. It's the higher-capacity factory option while maintaining the same overall usability as Sig's standard offerings.





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