Black ops is a great example of how to implement sway, both well and poorly.
Badly: The sniper rifle's had random sway making them inaccurate as fuck, especially at long range whereas the AK74U had 0 recoil, even with the rapid fire attachment making it batter at long range than the sniper rifles (luckily they patched that, but it took them months to do it)
well: the MP5 rapid fire will demolish every other weapon in the game at CQC, no contest you just spray from the hip and demolish people but its high recoil meant that it was virtually unusable at any sort of range making it a balanced weapon
well: the commando is more powerful than the galil (it does 40 damage to the galils 30) but the galil has less recoil making the guns balanced
well: all the guns have fixed sway you can use them over long range but some are easier than overs and it takes away the luck element
Badly: The sniper rifle's had random sway making them inaccurate as fuck, especially at long range whereas the AK74U had 0 recoil, even with the rapid fire attachment making it batter at long range than the sniper rifles (luckily they patched that, but it took them months to do it)
well: the MP5 rapid fire will demolish every other weapon in the game at CQC, no contest you just spray from the hip and demolish people but its high recoil meant that it was virtually unusable at any sort of range making it a balanced weapon
well: the commando is more powerful than the galil (it does 40 damage to the galils 30) but the galil has less recoil making the guns balanced
well: all the guns have fixed sway you can use them over long range but some are easier than overs and it takes away the luck element