2011 / STI / SVI - 170mm Magazine / Mag by MBX Extreme  

The next generation of race ready competition style magazine made from 410 heat treated stainless steel for ultimate durability

MBX Complete Tubes were designed to be competition ready with exclusive features to meet the highest demands for today's shooters.

The MBX extreme tube features designed body contour running the full length of the magazine for improved reliability and performance allowing for a wider follower to improve stability also featuring round location holes for 10 & 24 and precision cut feed lips.

These do not lock the slide back.