Newbius finds an odd exhibit in a museum. No, that’s not an M-4 with a shotgun’s sight rib– take a look at the muzzle. It’s Colt’s prototype Advanced Combat Rifle. What’s so special about it? It fires two rounds at a time… kinda.
So, instead of modifying the fire control to fire a two-round burst, (wait a second… the M-16A2 had a three-round burst setting) Colt made a rifle that fired two projectiles (of different weights) with reduced accuracy (two weights, two points of impact) from a specialized cartridge (reduced powder charge, logistics nightmares, non-standard). Anybody care to guess why the ACR contest went nowhere?