alfred10 Posted February 15, 2010 Share Posted February 15, 2010 What length barrel does the US military use? Does anyone use the 14'' barreled M4? What is shortened on this model? Is it less reliable than a full size? How hard would it be to mount a Knox folding stock? Quote Link to comment Share on other sites More sharing options...
cody6.0 Posted February 16, 2010 Share Posted February 16, 2010 US military uses the 18" on standard M4's butI'm sure they and other militaries also use the 14" in some situations. The 18" and 14" will both cycle decent ammunition the same. And you cannot use a folding stock on any Benelli semi-autos. Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted February 16, 2010 Share Posted February 16, 2010 Aside from the M3. Quote Link to comment Share on other sites More sharing options...
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