HA, what do we do with you?

[Rbstr]

This isn't intended to be a discussion of analogues to PS1's HA, but what you'd like to see as potential heavy weaponry in general.

Personally, I'd rather scrap the idea of them being up-close-and-personal monsters to a more LMG-based weapon. They would still offer more damage and more deaths-per-reload than a rifle, sustained fire would cause less loss in accuracy, provided the user has prepared.
They would have similar ranges to the standard rifles, but they would suffer from worse running-and-gunning penalties and poorer accuracy.
While the standard rifle is a bit of a finesse weapon, the heavy gun would be more of a blunt instrument. As it is currently. The idea is that these weapons would be great at suppressive fire, indoors and out. And while they would sacrifice some of the current indoors dominance for more general usability, they would remain a bit scary for a lone rifleman.

Even though that's a fairly large role change, not much about the weapon's current concepts need to change, except the jackhammer.
The MCG will change little, a larger(!) magazine might be in store.
The Lasher would need to be tightened up in the accuracy arena,
The Jackhammer would face the largest morph into a coil-gun that shoots buckshot to decent ranges instead of a sawed off shotgun with the spread of a claymore. The ROF would have to go up, but still shy of the lasher. Clipsize adjusted upwards based on the other factors so the kill-per-reload would be lowest, but still substantial.
All would suffer large recoil issues if not still and but recover very quickly if crouched.

Potential weapon upgrades, fewer than available for the rifle, because of the increased general lethality:
Bipods, (if prone exists, or grip if not). Decreases recoil problems significantly when prone (crouched for the grip)
Various scope-y type things
Short barrel systems - devastating to base accuracy (removes the ability for accurate long range bursts, basically), but greatly reduce run and gun penalty (to allow some of the indoors craziness back)
AP ammo barrel/refit - would deal substantial damage to lighter armored targets like maxes, buggies and aircraft, would make recoil problems worse (making it far less effective v. infantry up close), lower ROF, base accuracy remains the same...as does AI damage.