This is a fully Customizable Weapon Pack containing 16 guns, 3 Knives and 15 Attachments also a complete custom weapon skin system.
Ue4 Marketplace: https://www.unrealengine.com/marketplace/en-US/slug/customizable-weapon-pack
(CubeBrush) UE4 + Raw files: http://cbr.sh/4w4o9l
(CGTrader) Unity and Ue4 Mesh only: https://www.cgtrader.com/3d-models/military/gun/weapon-pack-acafe38c-837d-4cba-8673-24b05706752d
Music (L'indécis - Soulful): https://www.youtube.com/watch?v=7ZguAEoNpZw