stewj Posted February 13, 2012 Share Posted February 13, 2012 I am replacing the followers and springs on a sti 9mm 140 mag with new grams parts. It has the dawson tooless base. I am wanting the slide to lock back. Do I need the 11 or 13 coil springs? Link to comment Share on other sites More sharing options...
al503 Posted February 13, 2012 Share Posted February 13, 2012 Both will work but you want the 11 coil to get the max capacity of your tubes. Link to comment Share on other sites More sharing options...
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