Some minor buffs, but I think they would help:
[b]Heavy Slug Thrower[/b]:
• [!] Spins up this weapon.
• This weapon fires High Caliber ammunition that causes additional knockback and flinch, and has extremely little recoil
[b]Armor of the Colossus[/b]:
• Passively grants 4 Resilience tiers when holding this weapon (~10 PvE resistance)
• When spun up for 1.5s, generates an 80 HP Arc Shield that is 60% more resistant to Combatant damage (200 HP), and loads 30 ammo into the magazine each time it takes damage
[b]Legion's Bulwark[/b]:
• +68% Shield Resistance to Combatant damage (625 total HP in PvE)
• Creates a disorienting Kinetic Blast when the shield is broken, the blast deals +50% increased damage to enemies, has increased radius, and causes Arc damage if the shield is broken by Arc
• +Incandescent
• +Killing Tally
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I'd be happy if they gave it anti barrier rounds, and each bullet applied 2 scorch stacks. This would let you cause an ignition every 50 rounds giving it a nice damage buff and solar synergy. It would also make it counter both barrier and unstoppables.