AR Sponsor
Posted: 5/15/2008 12:17:35 PM EDT
|
Has anyone tried this combination or have an opinion about the advantages/disadvantages of this set-up? Thanks. |
|
just tried it. it will do 30 rounds, but the mag won't lock with the bolt closed and the mag cover does not work. it took a bit of effort to get the 30th round in, i don't recommend it. although it may work, the CMMG spring will stay in my aluminum mags everything seems to work fine with 29 rounds. i will have to test fire this combo to be sure. here is a picture with 29 rounds |
|
I've got a few that I cut two coils off and tossed in some PMAG's, No issues in a few hundred rounds. That said, the SS spring is a damn fine spring. 500 hr saltwater test, thumbs up, no corrosion whatsoever. CS spring was flakey moosh. Out of the ten's of thousands of rounds I've fired and seen fired by other Magpul employees I've yet to see one of our SS springs worn to the point of causing malf. One theory is that a weak spring will perform better in a PMAG than in a USGI or HK HR mag. The reason is the feed lips have less resistance and friction on the brass casing than steel or aluminum. That's why guys are reporting increased cyclic rates with the PMAG, less friction, faster and smoother feed. Wow, my bad. I'm ramblings. It's your choice, if you want to put a CMMG spring in your PMAG, do it. I've got some in mine just to see how they run and they run fine. |
Thats sooo true. I can unload rounds in my PMags with nothing but my thumb, they just pop right out. now my OKays, thats a whole diffrent story. 
|
MSTN did some tests and said that the PMag ran 50 rpm faster than the stock USGI mag running full auto in the same gun with same ammo. We suspect this is due to the reduced friction when stripping the round of polymer on brass of the PMag feed lips compared to the ALU on Brass of the USGI |
|
Gentlemen, I would like to ask what is the best replacement spring for ANY 30 round mag out there? I mean, is there a "BEST" replacement spring for when the spring actually does wear out? Am I correct that the CS ISMI Springs are considered to be a little stronger, but the SS springs are sometimes chosen istead, for their corrosion resistance properties? I thought I read that the CS ISMI springs are usually stronger, and have better memory (or better LACK of memory), and that's why they are liked by many. Is this correct? What companies offer 30rd SS replacement springs, and what companies offer CS 30rd replacement springs? |
Is that a good thing?? AFAIK the military specifies a certain cyclic rate when evaluating a certain weapon and likes it to stay that way. It seems that an increase in cyclic rate would waste ammo and cause more stress on the moving parts. |
AR Sponsor