survivalshop Posted January 12, 2014 Report Share Posted January 12, 2014 (edited) I just got a couple of the Gen.3 , 308 PMags & wanted to test them in my Picky CMMG lower , that doesn't like them , so I took some photo's to compare them by . Who knows maybe they changed something that will let them work reliably in my CMMG lower. The springs are flexing opposite & attached or anchored on the follower different. Spring on G# seems to be shorter New Gen. 3 on the left Looks like the Gen. 3 is longer , floor plate is thicker G3 on the left. G1 G3 bottom one is G3 , looks like they changed the follower. G3 is left one Edited January 12, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 13, 2014 Author Report Share Posted January 13, 2014 Well, the new Gen.3 mag failed in my CMMG on the second round. What I believe is happening , is the bolt is missing grabbing the next round & its being pushed into the feed ramp by the bolt carrier its self & wee all know what Failure to feed jam you end up with . (case smashing type ) This CMMG lowered build will just not work with any PMag ,its all about tolerance stacking . I'm waiting for the Lancer 308 mag to come to out & try. Steel mags work just fine in this rifle . Quote Link to comment Share on other sites More sharing options...
shibiwan Posted January 13, 2014 Report Share Posted January 13, 2014 (edited) Odd... them PMAGS work flawlessly in my CMMG. Wondering what's different and how much tolerances are off by..... Edited January 13, 2014 by shibiwan Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 13, 2014 Author Report Share Posted January 13, 2014 (edited) My lower looks like its in the mid 200's ser. # , so its a real early lower . The new rifles have no problem with PMags . I shoot a friends & his has no problems ,but his is new . The PMag's sit a little lower in the lower receiver, by just a few thousands of an inch . I have a thread around here on all that I have done to try to make them work , including replacing parts with AR 10 ones. Nothing has worked so far & I've been trying different things for years , since the LR PMag. first came out . I just recently bedded the action , because the fitment between the upper & lower were very loose fit . I was hoping that would help ,but even that didn't work . Edited January 13, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
shibiwan Posted January 13, 2014 Report Share Posted January 13, 2014 (edited) Perhaps a custom bolt catch to hold the mag higher may work.... just a thought. If that were the case, I'd try putting a small bead of steel on the top of the bolt catch, then grind it down to flatten/square it off, grind some off the bottom. Worst case scenario, I destroy one bolt catch. Edited January 13, 2014 by shibiwan Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 13, 2014 Author Report Share Posted January 13, 2014 You would have to alter the mag stop , that's on the mag, to get it to go higher in the receiver on every mag. you would want to work in this lower receiver & what would that do for the mag's capability to be used in other rifles ( mine ) <dontknow> I have put other uppers on this lower , ones that have no problems with PMags & still have problems . AS I have said , works fine with any steel mag. I put in it . Quote Link to comment Share on other sites More sharing options...
98Z5V Posted January 20, 2014 Report Share Posted January 20, 2014 SS, I'm trying to get ahold of the new ProMag 308 mags - I want you to run them in that CMMG and see if they work. <thumbsup> Quote Link to comment Share on other sites More sharing options...
survivalshop Posted January 21, 2014 Author Report Share Posted January 21, 2014 (edited) I'm also waiting for the Lancer's, to try out. Edited January 21, 2014 by survivalshop Quote Link to comment Share on other sites More sharing options...
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