X-Mag Breech O-Ring

[GordDesigns]

Well here is a simple Q/A for you guys.

The O-ring in the front of the x-mags breech, for locating the barrel.

What size is it?

O-rings are number sized by diameter and thickness. This is how I have to order them.

Does anyone know that number????

Thanks

[Dayspring]

PM Psychoballer here on AO. He had to order/find one himself.