Riven's DON'T apply during On-Call and the person you give this to does not need it in Railjack anyway so that's one less BS riven roll spree we have to chase thankfully

The "+150% Critical Chance with Rifles" elite trait pushes this to 100% and guarantees Tier 1 (Yellow) criticals for Hunter Munitions

Toxin progenitor bonus combines with modded cold to create Viral

Everything else should be self-explanatory

Give this to your 0 Piloting 0 Gunnery 5 Repair 5 Combat 5 Endurance godroll

EDIT: We can now put radiation on this with [Radiated Reload], combined with [Hammer Shot] and [Rime Rounds] it now has both decent status chance and status spread for surviving even the worst of boarding parties and also helping with defense objectives while also requiring only one forma total (!!!)