In case some of those people who missed the event; iEra veterans will never forget. Back then, iEra guns were quite balanced. With the exception of the super overpowered Shipka and Bar. Ak 47 can be up to par with m4. Starter pistols have no freeze rate. M3 was not bad. Pbp did not have brute power. M4 wasn't the only best spar gun.
Until one day... came the week of The Great Nerfings. Cloyd got many complaints about spammy guns. Cloyd decided to balance out the guns. But before his balancing was completed, he resigned. (I don't know the reason) His work was only like 1/3 finished resulting extremely unbalanced gameplay. M3 was one of the guns he nerfed.