Scar 20s 6.5 gas jet size for suppressed use

SoundFx

Sergeant
Full Member
Minuteman
Aug 13, 2008
218
20
48
NV
Hi All,

Got a 20s inbound and wanted to see if anybody has a suggestion on gas jet sizes for running suppressed. I’ll probably end up with a Nomad or Vox-S on the gun, so not exactly a low back pressure can. PMM said they didn’t have data on the 6.5 barrels yet so they couldn’t give me much to go on (not their fault).
Has anyone already done this and found a good solution? Many thanks in advance.
-Sfx
 
Don't hesitate to call PMM, they will be willing to talk specifics about your setup and recommend a good jet size. Buy a couple above and below in size as well to help the tune process.
 
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Thanks for the replies, Gents. On Friday I just bit the bullet and bought all the sizes from 1.20 to 1.40. When I get everything together I’ll figure it out going from small to large. Just didn’t know if someone had the info on hand. PMM did not want to recommend anything without having a 6.5 themselves, I guess. Their reply was short and clear, which is fine.

I post an update if I get some data. Don’t have a pin gauge set but I can do some informal tests with drill bits or something.
Many thanks,
Sfx
 
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