Baron85 Posted April 26, 2020 Share Posted April 26, 2020 (edited) I’m trying to get back into uspsa and 3 gun after taking 8 years off while my kids were little and recently traded into a used STI DVC 3gun 9mm. The person I traded with gave me 4 mags with the gun. It appears the 2 black ones are the factory sti mags that came with the gun and the 2 silver ones are aftermarket? I’m having multiple issues with the mags. The long silver magazine on the right is tight in the mag well. It goes in and clicks but won’t drop free. Appears to be too long front to back. It measures around 1.38-1.392” vs the other mags measure 1.365-1.38”. Can I just sand down the outside a bit? Is it the wrong magazine for the gun? Next im having issues with bullets feeding up the mag, seems the mags might be too wide inside and the bullets are wedging side by side? Best way I can describe it is the mag feeds a few then stops feeding, pull the mag out and the top portion of the loaded bullets in the mag are loose and you can shake the bullets out and about half way down or so there are bullets “stuck” I have to use a screwdriver to push down on the second bullet down and then the bullets come loose and feed up. This happens on the 2 black sti mags. I noticed that the 2 silver ones without spacers when they are loaded you can shake the magazine and sounds like the bullets are just Rattling around loose inside the magazines. Is that normal? My Glock, M&P, and other mag feed guns don’t do that, maybe because there is more space front to back? Last thing I noticed is the 2 black mags use spacers and the 2 silver mags don’t, the short silver magazine is shorter than the 2 black mags but uses a longer spring? There is also 3 different looking followers? can anyone help me figure out what I need to do to make these mags serviceable? I ordered 3 new style sti mags to be able to get shooting but would like to get these working as well. Thanks Edited April 26, 2020 by Baron85 Link to comment Share on other sites More sharing options...
Baron85 Posted April 26, 2020 Author Share Posted April 26, 2020 Forgot to post the picture Link to comment Share on other sites More sharing options...
3GN Posted April 26, 2020 Share Posted April 26, 2020 Forgot to post the picture2 black mag STI gen 11 st look like SPS or Infinity Last look STI gen 2Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
3GN Posted April 26, 2020 Share Posted April 26, 2020 Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
gator11 Posted April 26, 2020 Share Posted April 26, 2020 I gave up trying to make STI factory mags work and switched to MBX mags and they have all worked for me. I understand the new Gen 2 STI mags are supposed to be better though but I don't want to risk it. Good luck with your"s and enjoy the new gun. Link to comment Share on other sites More sharing options...
lroy Posted April 26, 2020 Share Posted April 26, 2020 When I had my 3gun sti, I used sti gen 2 mags without an issue. The rattling happens when the springs are off, The rounds get wedged in and bind up the follower. Link to comment Share on other sites More sharing options...
jkcolo22 Posted April 27, 2020 Share Posted April 27, 2020 Sent from my iPhone using TapatalkYup. This is what to do. 2011s are awesome, but the magazines are a PITA.Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
Baron85 Posted May 1, 2020 Author Share Posted May 1, 2020 Thanks for the video and tips guys. Going to try to tweak the mags this weekend and see how they do. Link to comment Share on other sites More sharing options...
jrswanson1 Posted May 2, 2020 Share Posted May 2, 2020 I bought a DVC 3-gun, new, around Christmas 2018. I have 7 of the newer STI magazines. I have never used spacers, and I've never had a problem with the magazines. I've shot everything from WWB to my own long reloads, no problems at all. I'm guessing the guy who sold this to you kept the newer magazines and dumped these on you, since you didn't know better. I'd suggest you get new STI mags and put these away. Link to comment Share on other sites More sharing options...
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