My new 9mm K baffle desighn

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zevdogs
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My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 11:42 am

For a colt 9mm AR-15 law enforcement only edition
Will have 6 in a 1.3 tube and a finished lenth of 8 inches
K baffles are heat treated 17-4 stainless
Barrel will be cut down to 10 inches and suppressor will be pinned and welded so no SBR

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Capt. Link.
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Re: My new 9mm K baffle desighn

Post by Capt. Link. » Tue Oct 11, 2011 11:49 am

Looks nice have you considered the texture on the out side of the cone it may delay gasses you have already separated from the stream.
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 11:55 am

Yes I wanted it smooth as to draw the gasses to outside chamber

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Re: My new 9mm K baffle desighn

Post by Capt. Link. » Tue Oct 11, 2011 12:05 pm

Sounds good how far along are you with your project I do admire the "spin you put on your K" yuk yuk CNC ?
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Re: My new 9mm K baffle desighn

Post by 82nd airborne » Tue Oct 11, 2011 12:07 pm

Rough surface finish has more negatives than the positives (if there even are any) when it comes to baffles. On of the main ones is that it collects fouling much better, and makes it much harder to get off.
Looks nice Zevdogs!
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 12:13 pm

Capt. Link. wrote:Sounds good how far along are you with your project I do admire the "spin you put on your K" yuk yuk CNC ?
This was all done on a manual lathe
All I need to do is clean up and finish turn the can and the paint with moly resin/ should be done today

The k baffles wear very easy and only took 20 minutes each ... So 5 hours to do the whole can

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Re: My new 9mm K baffle desighn

Post by Capt. Link. » Tue Oct 11, 2011 12:17 pm

Please post on how you did the spiral or pm me.
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 12:23 pm

Well it's a trade secret but what you do is take a 60 degree 3 flute countersink and have the rpm on the lath fast enough to still cut but What makes the spin effect is the chatter the c sink leaves

Haha no one else knows so don't tell

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Re: My new 9mm K baffle desighn

Post by 57fairlane » Tue Oct 11, 2011 12:31 pm

Great job, especially for a manual deal . . . .

porting looks too big to me but hey what do I know? (based on some MFG pictures) :mrgreen:

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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 12:36 pm

57fairlane wrote:Great job, especially for a manual deal . . . .

porting looks too big to me but hey what do I know? (based on some MFG pictures) :mrgreen:
Ports are just a little bigger but that's because it's made for a full auto 9mm rifle and hence the baffles are all 17-4 stainless

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Re: My new 9mm K baffle desighn

Post by Hoop » Tue Oct 11, 2011 12:54 pm

Nice work, looks like a paulnoiseless baffle with chatter.

Why not cut the barrel to 8.5"? Still would be legal and you will notice the extra.
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 1:04 pm

Hoop wrote:Nice work, looks like a paulnoiseless baffle with chatter.

Why not cut the barrel to 8.5"? Still would be legal and you will notice the extra.
My colt AR sight and hand gard only allow for 7 & 1/2 inches of barrel removal .... It's the AR on the bottom and it's taken alot to get it as a little brother to the 223

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Re: My new 9mm K baffle desighn

Post by PaulNoiseLess » Tue Oct 11, 2011 1:44 pm

Hi,

Yes, Hoop is right !, this K-Baffle reminds me that my machining skills just sucks.

Being a degree in Computers & Electronics and making Money hunting and designing Suppressors just don’t give me many time to do better. I’ll consider doing that when I finish my degree in Physics and Mathematics, not before, specially the last one. In the meantime, I do program CNC’s and just saw one of them once. I just didn't like the door, you know, i just don't like the fucking doors at all ...

Just one comment: Internal chambers are used for expansion, not compression so the cleaner the surface is the better, the faster and, of course, the cleaner.

Zevdogs, before you cut and pin and weld your Gun, you better finish the Can and have a 100 rounds of test. I do not have the dimensions but I can bet you the coin in the Pic they are going to bend. The neck is not your friend in this case …

Best,

Paul
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 1:53 pm

I wonderd about that but they are .120 wall thickness of heatreated 17-4 which should be very strong
But yes I am shooting it before the pin and weld

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Re: My new 9mm K baffle desighn

Post by Capt. Link. » Tue Oct 11, 2011 1:59 pm

I have seen decorative chatter and I have heard bs before but what can I say but NICE let us know how it turns out.I'm interested in the burn patterns that those swirls leave on the cone and faces of down stream baffles.
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Re: My new 9mm K baffle desighn

Post by PaulNoiseLess » Tue Oct 11, 2011 2:10 pm

Hi,

Yes, i know they are thick and also saw you are using 17-4 but that’s not enough.

Let me give you an example (and sorry for cooling down your thread …): Consider an Apartments Building that rests into a 4 thick and good pillars. What about if you just remove one ?. The other 3 are still thick and good and bla, bla, bla … but, what about the Building ?

Your hole is that missing pillar and your long neck is just the 50th floor. Consider going shorter to the neck (or just round it up so have larger contact surface), decrease the mouse hole diameter and just angle it to 60.

Also, think about rounding the receiving base and don’t create a step.

Best,

Paul
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Re: My new 9mm K baffle desighn

Post by Hoop » Tue Oct 11, 2011 2:27 pm

zevdogs wrote:
Hoop wrote:Nice work, looks like a paulnoiseless baffle with chatter.

Why not cut the barrel to 8.5"? Still would be legal and you will notice the extra.
My colt AR sight and hand gard only allow for 7 & 1/2 inches of barrel removal .... It's the AR on the bottom and it's taken alot to get it as a little brother to the 223

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Gotcha. I see you like to keep things simple and authentic looking.
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 2:50 pm

Well if the hole is to big and it weekens the baffle to much it isent finished so I'll destroy what I have and redoo

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Re: My new 9mm K baffle desighn

Post by PaulNoiseLess » Tue Oct 11, 2011 2:57 pm

Hi,

The hole is too big or your neck is too long (not your, you know … your Baffle’s one …).

Think about the building at watch at this: http://www.youtube.com/watch?v=Or_jkvPfCLY

It actually shows where and how K’s bend (not why and when … that’s a secret …)

Best,

Paul
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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 3:25 pm

Thanks I've seen that video before wich is why I made the neck on the K baffles ... As not to have a v pattern for a flex
I'll have it all painted and ready to shoot this weekend and I'll let you know how it handles

I'll also take photos of the blast burn pattern

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Re: My new 9mm K baffle desighn

Post by delta9mda » Tue Oct 11, 2011 9:37 pm

PaulNoiseLess wrote:Hi,

Yes, i know they are thick and also saw you are using 17-4 but that’s not enough.

Let me give you an example (and sorry for cooling down your thread …): Consider an Apartments Building that rests into a 4 thick and good pillars. What about if you just remove one ?. The other 3 are still thick and good and bla, bla, bla … but, what about the Building ?

Your hole is that missing pillar and your long neck is just the 50th floor. Consider going shorter to the neck (or just round it up so have larger contact surface), decrease the mouse hole diameter and just angle it to 60.

Also, think about rounding the receiving base and don’t create a step.

Best,

Paul
i disagree with the above except yes i would remove the "neck" of the cone.
NP

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Re: My new 9mm K baffle desighn

Post by SRM » Tue Oct 11, 2011 10:11 pm

Why dont you just make it like the tirant profile and be done.

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Re: My new 9mm K baffle desighn

Post by zevdogs » Tue Oct 11, 2011 10:47 pm

SRM wrote:Why dont you just make it like the tirant profile and be done.

It is done and ready to shoot ... Just need time to try it

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Re: My new 9mm K baffle desighn

Post by delta9mda » Tue Oct 11, 2011 11:00 pm

zevdogs wrote:
SRM wrote:Why dont you just make it like the tirant profile and be done.

It is done and ready to shoot ... Just need time to try it
even without modding the k i see no reason why this cant/ wont be pretty quiet.

report back and let us know how it runs.
NP

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Re: My new 9mm K baffle desighn

Post by zevdogs » Fri Oct 14, 2011 2:42 pm

Well shot it today and went through 100 rounds of military fmg and it works fantastic .
I can't wait to buy some subsonics to try but thease are photos with burn patterns of the blast baffle.... And no it didn't bend

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