Gas Port Data

[Bob Sacamano]

I agree tom. I do not understand why top end barrel manufactures cater to the bottom end ammo users. Funny thing is that I think they are embarrassed that they do, so to cover it up, they claim their port size is "proprietary" or a secret.

When I was 10.5-11.5 barrel shopping recently, I called a vendor on that list to ask about their "reduced" port size and was told it was a secret (I had to buy the barrel to find out). Of course, I did not buy it and I am glad, seeing the number posted in the document is what I would call "normal +" port size. I guess reduced is a relative term compared to the 0.080+ that seems common in that barrel length range.

After this last round of barrel shopping, I am done playing the game. If a vendor wont list it or tell me when I call, I wont bother. It is easier to just order a custom SS barrel to my full specs.

[vicious_cb]

I agree tom. I do not understand why top end barrel manufactures cater to the bottom end ammo users. Funny thing is that I think they are embarrassed that they do, so to cover it up, they claim their port size is "proprietary" or a secret.

When I was 10.5-11.5 barrel shopping recently, I called a vendor on that list to ask about their "reduced" port size and was told it was a secret (I had to buy the barrel to find out). Of course, I did not buy it and I am glad, seeing the number posted in the document is what I would call "normal +" port size. I guess reduced is a relative term compared to the 0.080+ that seems common in that barrel length range.

After this last round of barrel shopping, I am done playing the game. If a vendor wont list it or tell me when I call, I wont bother. It is easier to just order a custom SS barrel to my full specs.

Apparently no one makes a CHF LW carbine gas barrel except for DD and they go and make one with a huge gas port. I just dont get it, a 14.5" carbine gas with a 0.063" gas port is already over gassed enough to run Wolf with a heavy H2 what ammo is so underpowered that they need to open the gas port even further.

So Im going to end up spending $330 for the barrel plus another $25+ for Clint's threaded gas port insert.


In the end I just said f*** it, and bought a Colt gov't profile barrel. Id rather deal with the extra 4oz than deal with having to fix an overgassed barrel for a mere $200.

[Unreconstructed]

^ This is spot on. I don't like gov profile barrels, but I've been buying Colt gov profile barrels to avoid the stupid over sized gas ports.

[Glockman1968]

Black River Tactical Micro Tune gas block is the way I went. Pick your port size and go. Easy peasy. Not an adjustable so no worry there either.

[vicious_cb]

Black River Tactical Micro Tune gas block is the way I went. Pick your port size and go. Easy peasy. Not an adjustable so no worry there either.

I'm aware of it. I'm not going to spend extra $ on a premium barrel that should have everything done right in the first place.

Apparently no one makes a CHF LW carbine gas barrel except for DD and they go and make one with a huge gas port. I just dont get it, a 14.5" carbine gas with a 0.063" gas port is already over gassed enough to run Wolf with a heavy H2 what ammo is so underpowered that they need to open the gas port even further.

So Im going to end up spending $330 for the barrel plus another $25+ for Clint's threaded gas port insert


In the end I just said f*** it, and bought a Colt gov't profile barrel. Id rather deal with the extra 4oz than deal with having to fix an overgassed barrel for a mere $200.

[IKnowNotEverything]

Anyone have an idea of what Colt's 11.5" barrels are ported at?

[tom12.7]

Over the years, Colt has done some different things, but without a focus on 11.5" 5.56 AR's for volume, some others have been able to make some changes that, as a consumer of now, that we can take advantage of for many purposes. Options to the Colt 11.5" can be better had with some offshoots for solutions for some.

[Defaultmp3]

Bump for exposure.

[GrumpyM4]

I've had two Noveske N4 CHF barrels, both 10.5" measure out with pin gauges at .08" on the gas port.

One was a Noveske factory Mk18 URG with DD MK18 ris 2 and the other was an individual barrel with FSP.

[Artiz]

I just got a .089 figure from an Aero rep... for a 10.5, that can't be right.