[Request] Istant Swap

Hi all,
I'm new on the hex modding world and i've made a m4a1 mod with no run-delay
istant fire but i would like to know too how to put the istant spaw, like in this video i've found in youtube at 0.28-0.30 seconds.

Can someone tell me how i can edit this?

P.S This is not a double post, i've edited the other one cause wrong section

yeah, modify the "Select" section of the hex code. don't ask me how cuz i do everything with Model Edit now instead of hex