Ahhh the possibilities for my M-4.
One of my many ideas, minus the flashlight. Shotguns are best in the dark :)
M4A1 Carbine (I didn't really like the weapon system. But, that's what we had.)
Colt M4 carbine with Mk.18 CQBR upper receiver, fitted with Aimpoint red-dot sight and additional back-up iron sights
Colt M4 carbine, current issue model with removable carrying handle, right side
Colt M4 My baby :)
Colt Mk. 18 CQBR (M4A1 with a Close Quarter Battle Receiver).
The M16 rifle has resulted in numerous variants since it was adopted in the Vietnam War. The M-4 carbine (second from bottom) is currently used by soldiers in Afghanistan
THOR Global Defense Group TR-15 carbine, manufactured along the lines of US GI M4 and equipped with 10.5
Colt M4 carbine, current issue model with removable carrying handle, left side