Suppressors gas block

[PD DUMPER]

I've been looking for an adjustable gas block for a suppressed DPMS 308. Barrel is .922 in front of the original.
May I have a little help on what I "should" be looking for. I found .875, .750.
I'm missing something???

 

[2ndamendfan]

you should remove original and measure under the original, might be a slight step. a few manufactures make .936. I don't see anyone who makes a .922 adjustable or not.

 

[PD DUMPER]

Thanks That's the same info I've found.
I was hoping someone here might have had this before.

 

[PD DUMPER]

.936 it is. Thanks for the help.