What were your firearms complaints about the earlier seasons.
A few that come to mind...
They were using Airsoft guns instead of real firearms in Seasons 1 & 2.
There was a thread somewhere here where Andrea's pistol was firing but not ejecting shells or had recoil in S:02 E:06.
The faux .50 cal on the tank.
In Season 3 they had a guard on the wall at Woodbury with a Gamo air rifle. The Barrel was half cocked and gave the appearence of a bent barrel.