N noxin Joined Aug 8, 2011 Messages 8,422 Likes 1,527 Feedback: 37 / 0 / 0 Dec 16, 2012 #1/3 What length gas system does the Colt M4 use? Sorry, I tried to google it but just can't find it.
TY43215 NES Member Joined Nov 12, 2005 Messages 5,250 Likes 329 Location Other side of the bridge Feedback: 38 / 0 / 0 Dec 16, 2012 #2/3 Carbine