Quote Originally Posted by 3xDistilled View Post
I believe that the Halo Shotgun is supposed to be dual-feed like the Neostead Shotgun we have nowadays (google it): Two over-barrel tubes having 6 each. although it's also supposed to be 8-gauge, which is like 40mm grenade size. I find it hard to believe that 12 shells squeeze in there.
8-gauge? Really? Hm.

Also, 8-gauge is not 40mm grenade sized. No shotgun shell is that big. I know that a 4-gauge is sometimes used as a boat-mounted turret in duck hunting, and even that most likely isn't 40mm size.

Here's a few 8 gauge shells by a 12 gauge.