Hey uh, pardon for this really late reply, but can you explain further on what kind of visual glitch are you referring to?

weird visual glitch when aiming any weapon

I suppose it's the fact that unlike Call of Duty's IW Engine (Which itself is essentially just modified versions of id Tech 3 Engine), Battlefield's Frostbite Engine doesn't really have tools to export the animation data from the game itself, so you need to either making the animations yourself, or just put the model on top of other animations.

Although I'm not sure if there's any way to implement that now, since time has changed and this addon is really just a relic of time, a view of a Gmod SWEP addon back around 2015.

First I thought this was a pack with random CW looking weapons with sounds and animations that have nothing to do with BF3 (because there aren't any previews). And I was completely correct. This mod sucks. Why there's no authentic BF weapons mod?