#include <sourcemod>
#include <sdktools>

public OnGameFrame()
{
    for(int i = 1; i <= MaxClients; ++i)
    {
        decl String:classname[64];
        GetClientWeapon(i, classname, sizeof(classname));
        if(StrEqual(classname, "weapon_rifle_m60"))
        {
            if (GetClientButtons(i) & IN_ATTACK)
            {
                float velocity[3];
                GetEntPropVector(i, PropType:1, "m_vecVelocity", velocity, 0);
                velocity[0] = 0.0;
                velocity[1] = 0.0;
                velocity[2] = 0.0;
                TeleportEntity(i, NULL_VECTOR, NULL_VECTOR, velocity)
            }
        }
    }
}