K cup baffle question

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W071190
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K cup baffle question

Post by W071190 » Sun Aug 29, 2021 10:17 pm

Quick question on k cups. I was shopping for form 1 parts for my 9mm PCC and keep running across info that 9mm's do better with K cups. Though, I'm not sure how they work. How do they equalize pressure like clipped cones do?

quiettime
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Re: K cup baffle question

Post by quiettime » Mon Aug 30, 2021 7:44 pm

The flat face usually has a scallop in the entry hole to contribute to the turbulence. Then there is also a port in the waist of the K Baffle that vents to the V shaped space on the outside

W071190
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Re: K cup baffle question

Post by W071190 » Thu Sep 02, 2021 9:09 am

Yea I've noticed some k baffles having holes in their skirts.. But then do you still need clips now? And if they're clipped and have skirt vents, are they letting too much gas through now?

quiettime
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Re: K cup baffle question

Post by quiettime » Thu Sep 02, 2021 10:58 am

Yes you need both and they are 180 from each other. The clip or "scoop" helps create some turbulence that encourages the gasses to flow into the vent hole.

Older K baffles had a "mouse hole" at the large end of the V part of the baffle. This was discovered to be unnecessary and newer designs do not have them.

The AAC TiRant and the Dead Air Ghost are excellent examples of hi-performing K Baffle designs.

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Capt. Link.
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Re: K cup baffle question

Post by Capt. Link. » Thu Sep 02, 2021 1:12 pm

When I hear the term K cup I imagine some bar maid with huge tracks of land !

Mouse holes were abandoned for pistol caliber but they are still applicable for rifle calibers.You should investigate the so called Dater Hole for your 9mm build.These will lessen FRP and lower overall SPL along with uber small blast chambers.Don't short yourself on baffles used...a count of 9 is good for F1 builds.You are not using AAC baffles with the unique geometry they developed so a few extra helps.
-CL
The only reason after 243 years the government now wants to disarm you is they intend to do something you would shoot them for!
http://www.silencertalk.com/forum/viewtopic.php?f=10&t=79895

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