billdozer Posted May 13, 2017 Share Posted May 13, 2017 I bought one of the sps 170 mags. Wouldnt work from the get go. Tried tuning it with the dawson kit specs, still no go. Threw a grams spring and follower in it, won't work either. Anyone got some magic dust or special sauce i can rub on this turd? Link to comment Share on other sites More sharing options...
wgj3 Posted May 13, 2017 Share Posted May 13, 2017 Was it Bevin that used SPS tubes for his mag builds? There are some folk out there who can make it run, the question is whether or not its worth the coin... Link to comment Share on other sites More sharing options...
ChuckS Posted May 13, 2017 Share Posted May 13, 2017 1 hour ago, wgj3 said: Was it Bevin that used SPS tubes for his mag builds? There are some folk out there who can make it run, the question is whether or not its worth the coin... Yup. They work just fine. Link to comment Share on other sites More sharing options...
Glk21C Posted May 13, 2017 Share Posted May 13, 2017 Since SPS tubes are generally "softer" metal than sti, svi or mbx they don't tend to keep their shape as long. I had two that ran perfect for two years (Grams internals and bp's, tube dimensions tuned properly) until one day they would not feed reliably anymore. Did everything possible to make right again, they do now run but I'll only use them for practice. Link to comment Share on other sites More sharing options...
ChuckS Posted May 13, 2017 Share Posted May 13, 2017 (edited) 6 hours ago, Glk21C said: Since SPS tubes are generally "softer" metal than sti, svi or mbx they don't tend to keep their shape as long. I had two that ran perfect for two years (Grams internals and bp's, tube dimensions tuned properly) until one day they would not feed reliably anymore. Did everything possible to make right again, they do now run but I'll only use them for practice. The metal properties is why Beven likes them. Edited May 13, 2017 by ChuckS Link to comment Share on other sites More sharing options...
mro111lland Posted May 13, 2017 Share Posted May 13, 2017 What problem r u having? 9mm or 38 super I have 3 of them going on 3 years now no problems Link to comment Share on other sites More sharing options...
BeerBaron Posted May 14, 2017 Share Posted May 14, 2017 I have a couple as extra mags (2 170s and a 140). Ive actually so far found them very reliable. I did fit one of the 170s with grams spring and follower but their factory followers are not bad. I have heard their factory springs don't last so long in the 170s. One of mine has slightly tight feed lip dimensions but I tried it first and it runs well. Link to comment Share on other sites More sharing options...
billdozer Posted May 14, 2017 Author Share Posted May 14, 2017 (edited) Mainly nosedives with 9mm Edited May 14, 2017 by billdozer Added info Link to comment Share on other sites More sharing options...
mro111lland Posted May 14, 2017 Share Posted May 14, 2017 Spacers? If not good polish the hell out of the inside of them then wax the inside I use spray wax works great Link to comment Share on other sites More sharing options...
ChuckS Posted May 14, 2017 Share Posted May 14, 2017 3 hours ago, billdozer said: Mainly nosedives with 9mm The tube needs work in the double to single stack transition area. MRO: No spacers necessary with SPS tubes. Link to comment Share on other sites More sharing options...
Glk21C Posted May 14, 2017 Share Posted May 14, 2017 Yes, what Chuck said Link to comment Share on other sites More sharing options...
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