This is a rather simple suggestion, really.
As I couldn't find a direct way of allowing weapons to just slap in several offsets and fire like TF2's minigun, oh willy-nilly, since it just felt like you're using Contra's Spreadgun with only 1 shot is absolutely directed to a target while all else just supposedly miss. And just having 1 barrel for a weapon to fire several projectiles just seems a little too straightforward and somewhat feels like literally using a waterhose that directly pointed to one direction.
What I would want is 1 weapon with several Firing offsets, each possessing its individual spread, in order to produce an illusion of a rapid-firing weapon that goes beyond 30 FPS limit, or simply having a true spread-gun.
This is for anyone who would pursue Rapid-firing, but low accuracy weaponry and some glorified Shotguns in your wake.