WK180C - Barrel nut torque specs

[Iloverifles]

I want to take off that damn flash hider, so I disassembled the upper and when it came the the barrel nut being taken off, it was not even finger tight. I did not use any force whatsoever to unscrew it, simply used my finger tips. Is that normal? How tight should I screw it back on?

Thanks!

 

[hbean]

Just like an AR 35 ft/lb