[McTavish]

#include<amxmodx>
#include<engine>

public plugin_init(){
    register_event("CurWeapon","hook_curweapon","be","1=1","3>0") 
    register_plugin("Reduced Punch","0.1beta","Chillblaze")
}

public hook_curweapon(id){
    entity_set_vector (id,EV_VEC_punchangle,Float:{0.01,0.01,0.01})
}

this will remove the punch angles will remove the upward movement of the screen when shooting, but it will also affect the recoil of the weapon.
To address this issue, one approach you could take is to reduce the punch angles to a very small value, such as Float: {0.01, 0.01, 0.01} instead of setting it to 0. This will still remove most of the punch animation but will not completely remove the recoil animation.

Another approach is to try to reduce the recoil animation itself, so that it does not jump up abruptly. This can be done by adjusting the recoil parameters of the weapon, such as the recoil magnitude and recovery time.

However, these modifications would require more knowledge of the game engine and the way recoil works in the specific game you're working on. Additionally, it is not recommended to implement no-recoil feature as it would be an unfair advantage for the players who use it and would be considered as cheating by the gaming community.

It's important to note that modifying the game in this way may violate the game's terms of service and may result in your account being banned. It's always best to check the game's rules and guidelines before attempting to make any modifications.