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5/24/2017 12:49:26 PM EDT
Know of anyone making fluted chambers in their barrels?

I think POF and LaRue are making something similar, but I'm not sure how their technology compares to fluted chambers like the HK.  

Mainly curious.
5/24/2017 2:27:07 PM EDT
[#1]
A fluted chamber in an AR seems like a solution to a problem that doesn't exist.  IIRC, The HK has a fluted chamber to make extraction with its 'semi-blowback' or 'delayed blowback' system less hard on the cartridge.
5/24/2017 4:17:18 PM EDT
[#2]
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Quoted:
A fluted chamber in an AR seems like a solution to a problem that doesn't exist.  IIRC, The HK has a fluted chamber to make extraction with its 'semi-blowback' or 'delayed blowback' system less hard on the cartridge.
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Oh.  The problem exists, just not the way we are used to it.   POF and LaRue are doing something along those lines.  Is it needed?   I don't know.  I'm super curious though.   My gunsmith put this idea in my head.
6/30/2017 1:44:50 AM EDT
[#3]
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Quoted:


Oh.  The problem exists, just not the way we are used to it.   POF and LaRue are doing something along those lines.  Is it needed?   I don't know.  I'm super curious though.   My gunsmith put this idea in my head.
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I don't know the answer either. The idea sounded very appealing to me. Just seems to make sense. I bought a 16 inch POF barrel when they first came out . It's still in the wrapper as I decided to go with a 14.5. It's the most beautifully melonited barrel I've ever seen. Deep black, almost blue, and silky smooth. Looked down into the chamber and sure enough, can see a tiny channel in there designed to push gas back and improve extraction. Can't say if it helps or not since I never installed it. I'd sell it to you for a decent price if you're interested.

IM me if you are.
6/30/2017 9:45:08 PM EDT
[#4]
Email sent.
7/1/2017 9:45:50 PM EDT
[#5]
It's a very decent concept and merits testing...

I have a stainless Rainier Select 10.5" 5.56 barrel that I'd like to try it with. I emailed... I forget his name (Frank something?), but the POF guy; asking if he'd cut the flutes in the barrel. I was told by someone in contact with him that he'd almost certainly be willing to cut the flutes, which should be quick and easy, short turn around, probably relatively cheap.

No reply. Will email again eventually.

The problem does definitely exist. Normal solution is giving extractor more spring pressure, or more leverage.

Extractor o-ring supposedly adds 40% more pressure or something like that. A cheap, easy upgrade.
7/1/2017 11:14:06 PM EDT
[#6]
This is by no means fact, but I believe POF probably began doing the flutes while designing their "bolt" gun to assist with extraction since there was no gas system. I have no idea if it would be of any benefit a semi auto in any way.
7/3/2017 8:03:50 PM EDT
[#7]
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Quoted:
Email sent.
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Sorry. I don't monitor that email closely.

I just responded. Text or call me at the number provided if you're still interested and I can get you some pics. I'm right down the road from you!
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