How do I remove muzzle effect on a gun?

[Charlie]

I absolutely love this military sniper rifle and I can't seem to find any other sniper rifle that makes me this happy https://steamcommunity.com/sharedfiles/filedetails/?id=373111878 but the problem is every time I shoot it says in the commands:

Attempting to create unknown particle system 'muzzle_fire_sniper'
Attempting to create unknown particle system 'muzzle_smoke_sniper'
Attempting to create unknown particle system 'muzzle_lee_silenced'

I know I have to have Legacy Particles Support but I don't like the muzzle and I tried to edit the VPK but I couldn't find it. I just wish to not have it spam that in the commands every time I shoot because I want it clean!