MBX Extreme complete Caspian and Tanfoglio magazines come in two 9mm/.38 lengths: 140mm for Limited builds and 170mm for Open. Both arrive assembled, so you can stock a matched rotation without building from tubes, followers, and springs. Choose length by division gauge, then confirm your frame accepts Caspian or Tanfoglio-pattern magazines. Pair with the MBX Extreme Caspian base pad and Stealth follower when you want the whole stack from one maker. Fast same-day shipping on most orders at Shooters Connection.