8sianDude
Nice
Important: Weapon model and textures only
Since the AR-15 style rifles are extremely customizable, I've put these all in their own texture set, as I hope to make some more attachments in the future.
General PBR textures: BaseColor Metallic Roughness Normal AO
Unity 5 Textures: Albedo MetallicSmoothness Normal
Unreal Engine 4 textures: BaseColor OcclusionRoughnessMetallic Normal