STI 2011 base pads extend magazine capacity for the STI/Staccato-pattern wide-body 2011 magazine tube that dominates Open and Limited division competition at the highest levels of USPSA and IPSC. The 2011 double-stack platform is built around maximizing capacity, and base pad selection is one of the most consequential equipment decisions a 2011 shooter makes, directly affecting round count and reload timing on the clock. MBX, Dawson Precision, Henning, SVI, and Grams base pads are all built around the STI/Staccato-pattern tube dimensions that have become the industry standard for 2011-style magazines. Extended options maximize capacity for Open division shooters who want every possible round between reloads, while flush-fit and shorter pads suit Limited division shooters working within stricter capacity caps. Material options span aluminum and polymer construction, with weight differences that factor into overall gun balance. Given how central the 2011 platform is to top-level USPSA and IPSC competition, this is one of the most performance-critical base pad categories in the entire lineup. Fast same-day shipping on most orders at Shooters Connection.