I just bought a Model 1 shorty upper for an AR/M16. I bought a bunch of the DPMS/Gtech Frankenmags from various folks on the EE here.
Took it out to the MG shoot this weekend, and not a single mag would work. I tired playing with the feed lip on one mag, it would only occasionally work, singles always than a jam. A few times I would get two rounds before a jam. GRRRRRR
I still have some of the all black no-name mags that I didn't bring, so I guess there might be hope that they will work, but is anyone else having feeding problems with the GTech/DPMS mags? How di you fix it?
This thing looks like it should be fun, if..............if I can make it work.
Well, it may be the mags, and it may be the upper itself. Try this.
Take a standard 20 round GI 5.56 mag and load 5 of the the 7.62 rounds into it. That will duplicate the standard mag that Colt supplied w/their 7.62x39 pieces. If the rounds all feed w/o problems, then it would seem that you do have mag problems. But if you get the same malfunctions w/the piece, you need to talk to Model 1 about what they sold you.