Magazine, for STI 2011 140mm 38/9mm 23 Rds, with Competition Follower, by MBX

1 Review
MBX Extreme
9mm/38 Super
23 Rounds
IL; CA; CT; MD; VT; OR; Oregon; HI; Washington DC.; MA; NY; NJ; New York; CO; VT; California; Colorado
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  • Attention Oregon: Starting 12/01/2022 high-capacity magazines will no longer ship to your state.
  • MBX Complete Tubes were designed to be competition ready with exclusive features to meet the highest demands for today's shooters.
  • This is for competition use and will NOT lock back the slide.
  • Made from Heat Treated 410 Stainless for Ultimate Durability. 
  • Witness holes on rear of tube to indicate round count for all tubes.
  • No spacer required for 9mm/.38 magazines.
  • Restrictions apply in some states.


Write A Review
  1. Solid magazine

    Posted by Dennis on Oct 29th 2018

    These mags live up to the hype. They are pricey but work flawlessly right out of the box. No need to tune these mags at all. I received mine in 2 business days.