Thread: DPMS Rifles
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Old December 2, 2012, 09:39 AM   #17
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Join Date: August 31, 1999
Location: Allentown,PA
Posts: 1,946
At least half of the AR15's being used today do not meet the mil-spec, they have 4140 barrels, 8620 bolts and commercial size RE's, but they still run fine.
Bolt= Carpenter 158
Carrier= 8620
Barrels= Depends on model, but they do use 4140, 4150, and 416 SS
Receiver Ext.= Depends on model. (My MK 12 came with mil-spec receiver ext. and SOPMOD stock.
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