USE Pistol Acuity rank 10 mod in that empty slot because it hasn't been added to the Overframe yet

I definitely recommend using any skills to remove armor from the enemy's / increasing vulnerability skill's / damage multiplayes skill's

• Tested on Steel Path Corrupted Heavy Gunner lvl175 with enabled ai without companion and skill's

Pistol has up to 290.000 damage in single hit with max temporary effect's on full armour enemy

Pistol has up to 1.280.000 damage in single hit with max temporary effect's on stripped armour enemy

• Tested with same enemy parameters, but with 10 viral stack's from Vulpaphyla companion

Pistol has up to 3.000.000 damage in single hit with max temporary effect's on full armour enemy

Pistol has up to 5.200.000 damage in single hit with max temporary effect's on stripped armour enemy

• Tested on the same enemy with Frost warframe ultimate 101% armour strip and Biting Frost augment

Pistol has up to 5.700.000 damage in single hit with max temporary effect's on FROZEN - 10 stacks ice stripped armour enemy

• Tested on the same enemy with Frost warframe ultimate 101% armour strip and Biting Frost augment and 10 viral stack's from Vulpaphyla companion

Pistol has up to 18.200.000 damage in single hit with max temporary effect's on FROZEN - 10 stacks ice stripped armour enemy