When i change fov some of the weapon butt doesnt show up it look like it been cut in half so can anyone help me fix this issue please

A few questions, what game? what weapon? what anim replacer are you using and what FOV value? Post a screenshot if you can so we can see the problem.

well its falloutNV the weapon im using is the pusle rifle from mrradioactiv weapon pack im using asurah reanimation pack the fov is 85 here is the picture
reason for edit: wrong fov

The issue is the gun wasn't made for that large a FOV. You will having clipping/ missing texture issues with many weapons and armours over 70 FOV, really. You just have to decide your preference. I play at 70 myself and it's plenty enough, but I don't use animation packs like Hitman's or Asurah's, which I know have FOV minimums in order to work. There may be no fix for that unless you want to edit the weapons to better represent first person.

Ok, its clipping into the camera because the gun is huge and the idle is too high and close to the screen. There's not much you can do other then setting the clipping distance value "fNearDistance" in your inis to something much lower then normal like 2 or 1, so like.

fNearDistance=2

Bare in mind that this will greatly increase the flickering in the distance (z-fighting) however its really you're only option if you want to stick with those animations or that gun.

Cheers

ok got it so looks like im wont be using the weapon

I've been wondering this for years myself wasn't aware there was actually anything the could "fix" the issue thanks for bringing this up.