Just take other toy's weapons and check, it's the best way. Measuring at that small isn't gunna really tell you for sure. Gotta test the tolerances.

I used Motormaster's gun as my standard test -- then used several other weapons from different generations to confirm.

And we've had some problems with reissues -- so please use the original Ratbat if you can.

--Jhiaxus.
(Thanks for any help you guys can give.)