problem with "Modern Warfare âœĻ ð’ĩ𝑒𝓈𝓉𝓎 âœĻ Base"

Hi, I have a problem with this mod, well to be exact not specifically with it, but with the weapons that are there. After some time of the game it just flies away and starts huge lags, if it will be possible to attach a video. Who has faced with this?