Ok.

-Iron sights are incorrect. the front sight is way upwards on the sight picture
-most optics are very bugged. thermal flir, acog 2.1x, trijcon rmr and maybe others

-They're right. The pin between the prongs is intended to be centered through the rear hole. That way, the operator knows the barrel is centered.
-Bugged how so? If they're clipping through the rear ironsight, that I can fix.

Unistalled some other addons now it works

i see a missing texture when i crouch and shoot it. it seems to be a bullet maybe