Mods for Guns.

[UmbralLegendN]

I need some minor assistance building a few of my weapons. I want some opinions on what mods these few weapons should have attached.
Pistol- Malorian Arms 3516
SMG- Fenrir
Shotgun- The Headsman
Sniper- Overwatch
Katana- Soburo
Arm Mod- Mantis Blades
Any help is much appreciated.