Raw hm1000x old style reg oring size

[Airdudebro]

What is the size of the oring in the picture. It goes on the outside of the reg? Any help would be appreciated thanks

 

[Ranchibi]

I believe it's BS015 = 14 x 1.78mm but don't quote me on it!

 

[Airdudebro]

Is this for the old style hm1000x or the new hmx? I knowbthe reg thread size if different not sure of the oring? Raw will not tell you any oring sizes its like its a big secret lol. Thanks ill give it a go