The JG mech box is decent. I hammered on it in sub zero weather but it was not JG stock. Spring was swapped for a modify s100 so it is shooting a little softer. Expected it to break but it didn't. Not the best box you could use but definitely an alternative. It's still a little noisy especially in a full metal shell. The JG box with a downgrade spring, and a few other small upgrades, sings with a 9.6v mini. Just ask Zeon. He ate plenty of rounds during his terminator game.
