Larry Vickers has published a short video about the Colt M4A1 Carbine on his Vickers Tactical YouTube channel today. The video is a short discussion about weapon features and a live fire demonstration.
The Colt AR-15 Resource
"A site dedicated to the history of the Colt AR-15 rifles, carbines and associated items"
The Colt AR-15 Resource 
Way cool..
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