I used Inter's animations cause they look nice and also somewhat similar to MrBrightside's Redux. Original INS2 mod didn't have Juniez' shaders like SMG1/Pistol/AR2, so i messed with materials and tried to imitate shaders from this video. I don't know how shotgun muzzleflashes work IRL, so i left them as they were in Inter's original mod.
I might sound dumb for saying this but how did you get Juniez's shotgun model? I remember Juniez said that on a thread a around 2 months ago that he did not have the other models besides the pistol, the SMG, and the AR2.