In Tight Corridors, Shorter Means Surviving

Anyone who has brought a full-length M4 into a CQB arena knows the feeling. You try to slice the pie around a corner, but your barrel pokes out first, announcing your presence like a flag. You attempt to push through a doorway, and your stock catches the frame while your muzzle scrapes the opposite wall. By the time you finally squeeze into the room, the defender already has you dead to rights. That moment teaches you a lesson no YouTube video can: in indoor combat, every centimeter you shave off your gun is another percentage point added to your survival rate.