I'd like to see M4 being replaced by any semi-auto shotgun that allows to replace whole tube/mag when reloading, like Maul, SRM M1216, Saiga-12 or USAS-12. Reloading shouldn't even be a problem on t3 shotgun.
Heh.
But actually, giving the M4 a mag or something to relead all 6 shells at once would definately make me consider using it. At the moment it has extremely fast firing rate but its useless due the slow reload and small capacity in general.
Wether a mag on M4 is realistic or not is another matter though.
Make it shoots sharks that EXPLODE into mini-sharks that also EXPLODE and release a shower of deadly acid !
(Also I laugh at the reload... Postal 2 for the win )
As long as the choice is M4 or AA12, it will always be AA-12. Thats the wrong choice here.
The choice SHOULD be M4 or Double Barrel as 2nd weapon slot. But the weight on the M4 prevents this right now unless you take the perk. And IMO its not worth it to take the perk so you can pick the M4 over the DB.
Reduce the weight.
Wether a mag on M4 is realistic or not is another matter though.