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AR15.COM
8/14/2006 1:42:55 PM EDT
Was at Gunmaster in Plano and saw an upper (can't remember brand).  Sign said quick-change barrels.  Anyone have experience with these?
8/14/2006 4:56:02 PM EDT
[#1]

 Probably this: www.mgimilitary.com/qcb.htm

 One DFW member has it.  IIRC, usma89.
8/15/2006 5:19:31 AM EDT
[#2]
I shop there also, have bought my 700 VSF there but, i was looking at uppers and they had a used RRA M-4 with no bolt $550. The gas tube was purple, i asked the owner about it, he said it was a good deal, lightly used.