mm 40mm grenade porblem
 

i am just wondering if anyone can tell me the oring size for the valve, i went and bought number 016 orings and they fit but are so tight i dont think they will lock into place on there own.

it is for a mosquito molds 68 rnd grenade and 120 rnd grenade.
also if someone could point me in the right direction for more ball bearings, i dont want to pay shipping on the rebuild kits at airsoft parts, to much shipping for just little parts

take the original oring and your valve bits to the hardware store, size them up and test fit them?