SIG MPX Mag Extension +20


16 in stock

  • Comes with spring
  • Adds 20 more rounds
  • Designed for fast, easy cleaning
  • Allows for bolt hold open
  • Made of delrin
  • Machined in house

16 in stock


We’ve designed this mag extension for the SIG MPX with you in mind. Running this in a match will let you clean the mags with ease and give you 50 rounds total per mag!* You won’t need to make any modifications to the follower as well. If you’re thinking of doing some upgrades on your SIG MPX for competition, this a great place to start!


*Mag is designed to be used with SIG MPX 30 round magazines.

*Does not come with magazine


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