Centuriator Posted February 11, 2019 Share Posted February 11, 2019 (edited) OK, I have my new STI handguns and I purchased several 140mm magazines from STI, they all work great, but I'd like to ad some Taran Tactical extensions to them and .... dang ... I'm confused and/or stupid and probably both, but I can't make heads or tails of TTI's instructions. I have Glocks and when I buy TTI extensions for them, the ones that hold the most extra rounds come with extra-power springs, but in this case, as best as I can tell, if I buy the largest extension for the 140mm mags they do not supply extra power springs. I'm using 9mm by the way. The mags I have now hold 21 rounds, and if I add TTI 7mm extensions, I am having a hard time figuring out how many extra rounds I will get and if I need to buy extra power springs, and if so, what exactly. The TTI chart confuses me. Thanks for any help. Edited February 11, 2019 by Centuriator Quote Link to comment Share on other sites More sharing options...
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