drew - model, bp icon design
boomsta - texture, attachment mounting, bp icon model

Weapon Accessories would work like Festivizers. Accessories are tools that can be applied to specific weapons regardless of quality type, as long as the gun isn't modified with another accessory (like a Festivizer).

Applicable to the following weapons

Black Box
Grenade Launcher
Pistol
Revolver
Rocket Launcher
Sticky Launcher