Killzone Weapons should have customization.

Don't know how familiar you are with the franchise but throughout the series especially the first two games the Weapons often had attachments, from different sights too under barrel Grenade launchers and Shotguns.

Without it People won't use them since comparable weapons can be customized. Also the Helghast sniper in the game was a Tri laser that shit 3 simultaneous very accurate shots and for some reason it shoots Halo convenient plasma blobs.