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Posted: 5/2/2021 10:16:07 PM EDT
[#1]
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Posted: 5/3/2021 5:59:58 AM EDT
[#2]
Over the last few months I've run about 500 rds through my 7.62X39 upper on a DIAS lower using a A5 length buffer tube, Kynshot RB5007 and Tubb spring.
I have not measured the spring OAL but functionally everything feels the same. |
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Posted: 5/3/2021 7:23:42 AM EDT
[#3]
Quote HistoryQuoted: Over the last few months I've run about 500 rds through my 7.62X39 upper on a DIAS lower using a A5 length buffer tube, Kynshot RB5007 and Tubb spring. I use the .308 Tubb flat spring with my MGI setup using unmodified AK mags/drums. The rough feed lips of the combloc mags require more force to strip the rounds off. If using C products mags, the 556 Tubb is fine. I've also tried using the rifle length Geissele spring which works fine but has a faster cyclic rate. More info specific to 7.62x39 with various cyclic rate info here: http://www.c3junkie.com/?page_id=185 |
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Posted: 5/3/2021 7:54:27 AM EDT
[#4]
deleted
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Posted: 5/3/2021 2:08:53 PM EDT
[#5]
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Posted: 5/3/2021 2:09:50 PM EDT
[#6]
Any recoil spring of the proper spring rate and pre-load made from Cr-Si or Cr-V alloy steel should provide a much longer life span regardless of cross sectional shape when compared to the more common high carbon and stainless steel springs.
MHO, YMMV, etc. Be well. |
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Posted: 5/5/2021 9:59:42 AM EDT
[#7]
I ordered a couple Tubbs springs. I'll see if that solves the issue.
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