Fx crown barrel oring issue

 
The reason a ask is because the width available for the oring that broke is dependent on the brass receiver treading in to exactly the right spot. 
The fact you broke an oring may be because the gap is to narrow and not allowing the oring to seat correctly. The other oring at the back is just a machined groove. If your new oring fit there but not In the other groove then the tolerance there could be your problem. 
 
"Dirte"Last week I sent FX an email wondering when they would release their parts list. I never got a reply, and suspect I probably wont. Generally I pull out the calipers, and try to get a size and order a few different sizes that are close. Share with us what you find out.
I would measure mine for you but it is still on order. Sorry
I appreciate it man i emailed aoa and asked them and still waiting on the reply
 
Dear Omaralla, why dont you just measure it with Vernier Calipers, its very easy:
first number is the internal diameter, second number is the thickness. sounds like your supplier selling metric which is good, you are not that way off.

AS, BS numbers work different way so stick with the 10x something in metric way of looking at it.
If you change the thickness you may have to change the ID too, so do not measure the wrong size new o ring but measure the old.

I feel for you guys, it is very bad for owners that FX wont give you the numbers, it should be in the manual, what is in the manual, warranty and safety poop only?
Any spare o rings come with the gun? if it is a caliber changer, definitely would belong to the package.
 
"sirk"Dear Omaralla, why dont you just measure it with Vernier Calipers, its very easy:
first number is the internal diameter, second number is the thickness. sounds like your supplier selling metric which is good, you are not that way off.

AS, BS numbers work different way so stick with the 10x something in metric way of looking at it.
If you change the thickness you may have to change the ID too, so do not measure the wrong size new o ring but measure the old.

I feel for you guys, it is very bad for owners that FX wont give you the numbers, it should be in the manual, what is in the manual, warranty and safety poop only?
Any spare o rings come with the gun? if it is a caliber changer, definitely would belong to the package.
Thanks man I will measure it today i just have to buy the caliper