My mags are all like new. I have the two 30rd DPMS ones that came with the gun and one 30rd one that I bought at a local store, looks like one used by military. Can't remember what make it is, but it has the green follower. All the mags seem to function the same. I load 1 round in each and cycle through them. I am using Federal xm855 green tip, Remington .223 45gr jhp, Wolf .223 55gr, and Winchester 5.56 55gr. I bought the Wolf because I read it is supposed to be a weaker round. My thinking was, if it locks back with weaker ammo, I have a over gassed condition. The heavier buffer definently helped. I ordered a heavier buffer spring and extractor spring kit today, so I should know where I stand shortly. I have never had a failure to extract or feed.
I have had this problem from the day I bought the gun. I called DPMS and they said to send them the lower reciever, but I never did. I figured I could fix it myself.


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