There is no mention of the Bushmaster M4 Type Carbine in the cites mentioned.  A .223 Bushmaster rifle is what is mentioned.  Also, there is no need for unrelated AR-15 data being here, where it is trivia at best.  Have removed the Original Research and WP:SYNTH that a .223 Bushmaster rifle is a Bushmaster M4 Type Carbine.  Find a reference that states it was a Bushmaster M4 Type Carbine, and that is a different cite and a different case.  But, the present cites don't support the inclusion of what is, at best, unrelated trivia, in this particular article.  Have removed this data, which doesn't belong here.