hook.Add("KeyPress", "aeoBeam", function(ply, key)
    if key == IN_ATTACK2 then
        local wep = ply:GetActiveWeapon()
        if wep:IsValid() and wep:GetClass() == "weapon_357" then
            ply:Cexec("pac_event somename 1")
        end
    end
end)

hook.Add("KeyRelease", "aeoBeam", function(ply, key)
    if key == IN_ATTACK2 then
        local wep = ply:GetActiveWeapon()
        if wep:IsValid() and wep:GetClass() == "weapon_357" then
            ply:Cexec("pac_event somename 0")
        end
    end
end)