Seized Mechbox

[swampdonkey]

well when I was playing airsoft with my friends my battery died and I went to change the battery and the mechbox seized up so ive taken it apart probably 6 times and I reshimmed it every time but it still keeps seizing up so if anyone has any suggestions that would be great oh and its a CA m4.

[AustinWolv]

It would be much easier to read your post if punctuation and basic sentence structure were used.

Use a fully-charged battery.

Shim the mechbox correctly.

If that doesn't work, check the gears carefully to make sure a tooth didn't snap off and get wedged between the teeth of another gear.

That's all I can offer with the info you've given thus far.