Should not be implemented in any existing game mode but should be implemented in a modified conquest game mode maybe called "Power Conquest."These power weapons could be dropped in by Squad leaders (enemies can capture it) OR they could be found in control points situated on or near the middle of large maps.
Example: Barrett m82 that could do 16 vehicle hit points on ATVs and on Helicopters, 12 on unarmored cars and do 10 on IFVs. Does the same amount of damage as the M200 on players but has more bullet drop, slower velocity, identical rate of fire. 3 standard mags with 5 bullets each. Cannot be resupplied.
Example: M79 Grenade launcher: Launcher that shoots impact grenades that do a high amount of explosive damage. The projectile will of course exceed the distance of a thrown grenade. But the grenade itself will have the existing impact grenade damage against vehicles. 6 shells. Cannot be resupplied.
Issue here is that there is no mechanic that allows players to pick up or drop weapons.