Colt LE6920 M4 carbine, 16” barrel, 5.56 NATO. Recently added a Magpul handguard and Colt detachable carry handle. I have only put a few hundred rounds through this firearm. It works perfectly and is in pristine like-new condition. It is a Colt, so you cannot go wrong. I will only sell to Idaho residents with a DL or CWL, and those willing to sign a bill of sale to document the transaction.