Complete Magazines

Leave it to Brazos Custom to come up with options.  Buy the "standard" capacity magazine that best suits your needs:




STI Magazine

The factory STI magazine is built using all STI parts.

STI Tube
STI Spring
STI Follower
STI Basepad

120mm, 126mm, 140mm length  = $60
170mm = $100/$107 for 9mm

Click here to buy.

Brazos Super Tuned Magazine

Truly superior, the Brazos Super Tuned magazine uses premium aftermarket, and it has been tuned for reliability and maximum capacity. 

  • Tube dimensions (inside and out) are set for maximum feeding efficiency.

  • Lips of the tube are set to optimum specifications.

  • All sharp edges are rolled.

  • The tube is polished both inside and out to a high gloss, slick finish.

  • Magazines are tuned to fit the U.S.P.S.A. gauge and will hold 20+1 rounds of 40 cal or 21+1 of 38 super in 140mm magazines and 28+1 of 38 super in 170mm magazines.

STI Tube
Grams Spring/Follower
Grams, Dawson. or Taran Tactical Basepad

40 S&W/140mm = $150
38 Super/140mm = $150
38 Super/170mm = $175



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Note:  While most tuned 170mm magazines will hold 29 rounds, we recommend using no more than 28 rounds.  We have found that using magazines with 29 rounds can crack grips.