This will get the carbon busted off in a hurry...

C.A.T. M-4 Cleaning Tool

This little tool won’t get you past a weapons inspection at M.C.R.D. but it will keep your rifle shooting.  The C.A.T. M-4 Tool (Combat Application Tool) is a handy piece of gear.  Solid stainless steel, no moving parts, nothing for a grunt to break…  It will clean your M-4 / AR-15 bolt, firing pin and bolt carrier in no time.

You can go here to pick up a C.A.T. M-4 Tool.

In case you forget all the things this can do… …or you are in the infantry, they made a picture. (Reading Required)