User blog:Heatedpete/Modern Warfare Pack-a-punch

What would be the pack-a-Punch upgrade for guns off Modern Warfare & MW2? Im talking stuff like the Barracuda (MG42) and the Gutshot (trench gun) but for guns like the ACR and UMP

please list your ideas below, and try not to repeat guns that have been said already

Example: Upgraded M16A4, named 'The VietKiller' 45 round magazine with 5 round bursts, and increased range