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Posted: 1/28/2010 8:38:11 PM EDT
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I purchased a DPMS MOD A-15 a few months back. Before buying it I did not check to see if it was Commercial Spec or Mil-Spec. After doing a little bit of research on the web, I came to the conclusion that most if not all of DPMS rifles are Commercial Spec.
I have a few questions: 1. Are Mil-Spec and Commercial Spec parts interchangeable? 2. What exactly makes a Mil-Spec a Mil-Spec and a Commercial Spec a Commercial Spec? Thanks for the help. Eric |
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1. depends on the part.
2. Milspec means it was tested to a standard for the military. this may be better or worse than some commericial applications and depends on what you want to do with your rifle. I have one DPMS rifle and it works good for me. I also have an M&P 15 and it is just a good. but I'm not smoking jihadist on my off days. just paper, steel, and p dogs |
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Mil spec in refrence to the stock/buffer extension is the outside diameter of the tube and how it was made. A Comm spec stock will fit on a Mil spec tube, but it will be sloppy. A mil spec stock will not easily fit on a Comm tube and is not recommended. The mil spec design is a stronger over all design, especially at the end o fthe tube where it mounts to the lower reciver.
A mil spec upper usually refers loosely to the fact that it has M4 cuts to go with a barrel that has the M4 cuts on the extentions. These cuts really only give you a benefit with Full auto fire, but it's preffered by many in their Semi-autos. A mil spec barrel usually means it's a 1/7 twist 4150 steel. Comm spec are ually 4140 with a 1/9 twist. The 1/7 will handler heavier loads like the military 77grn bullets. The 1/9 is recommended at 66-69grn max. A mil spec BCG will be MPI tested. A Comm spec may not be. I may be missing a few things, but these are the things that come to mind. |
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