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Are you using any hidden css weapon mods with a right hand fix? Because if so, the "fix" is a script in the mod files to make the gun right handed.

i just have skin models and it didnt work

A script will work with a skin or model, but not another script, like weapon stat changes or huds (which are also considered scripts). Scripts can work together though if they are for different guns, like one for the AK and another for the M16.

For example: If you have two script mods for the SMG, one mod changes the damage and the other changes the fire rate and clip size, they may do different things, but since they are two different mods they will cancel eachother, and neither will work.

The mod will only work if you aren't using another mod that changes the stats.

cause i made sure that there are no other mods messing with it or do i have to have not use all the scripts

oh so if i have gun to make the m16 like an ar15 im it wont work

Subscribe, load up addons on the game menu and see if they are enabled. But make sure you're not using any mods that affect the stats of the same weapon, they will conflict and not work.

how do i get them to work

You're welcome