A buddy of mine and I were having a discussion the other day about how Colt no longer sells the civilian M4 with the carry handle, and usually attaches a MagPul MBUS (although I've seen photos with the Matech sight).

It dawned on both of us that we're curious as to how the dot-mil gets them.

Carry handle? MBUS? Matech sight? When a new military M4 is uncrated at the base, what comes with it?

This also led to a discussion about other things: What are the standard optics, lights, rails, etc. on an issue M4? I'm not sure I've ever seen a complete breakdown with specifics. If one were to want to duplicate a military M4 as close as possible minus the naughty bits of course, what accessories would one need?