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12/14/2010 3:25:20 PM EDT
DPMS Lower and lower parts kit. everything put together to spec. I currently have 2 USGI mags 30 round, 1 Magpul Pmag 10 round, and 1 Magpul Pmag 30 round.

Both USGI and the 10 round Pmag both drop free without issue. However the 30 round Pmag does not. Wondering if this is just a mag production problem I gave it to a friend who tried it in both his AR's and they both dropped the mag free without issue.

Would anyone know why this would happen??? Any help is appreciated.
12/14/2010 4:44:08 PM EDT
[#1]
Your receiver is tight on the magwell. Lightly sand the rear tabs on the Magpul magazines to get them slightly smaller in size, they should drop free. Its not going to take much sanding on the two tabs.............

I will look for the picture posted here many times.
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