User Panel
User Panel
User Panel
|
Posted: 9/17/2022 3:31:45 PM EDT
I picked up one of those teslong borescopes finally and wanted to check out the condition of some barrels I have. These 8 are exactly the same, same manufacturer, length, gas port size, 4 are made on one day and 4 the day after.
My question is does it make a difference where the the gas port is located? Is it better to be on the land, in the groove, or across both to some degree? Out of these 8, which one looks the best and which looks the worst? Thank you #1: half land, half groove  #2: pretty much centered on the land  #3: two thirds groove and one third land  #4: all groove  #5: mostly groove with a touch of land  #6: three quarters groove and a quarter land  #7: two thirds groove and one third land  #8: similar to 2, pretty much centered on the land  |
|
|
|
Posted: 9/17/2022 5:08:07 PM EDT
[#1]
My question is does it make a difference where the the gas port is located? I doubt it matters, but don't think anyone has done any testing to determine that. It would be a difficult task to torque a barrel extension and locate the gas port to a specific position relative to the lands. You can see from your images that there isn't a whole lot of real estate between the lands and grooves. Much ado about nothing, and yet another reason I will never own a bore scope. |
|
|
|
Posted: 9/17/2022 5:11:04 PM EDT
[#2]
Double-tap
|
|
|
|
Posted: 9/17/2022 7:10:28 PM EDT
[#3]
I agree that I don't think it really matters.
With all the variations in twist, rifling, calibers, clocking of the barrel, etc. it would be almost impossible for a manufacturer to get the gas port in the groove every time. |
|
|
|
Posted: 9/17/2022 7:17:54 PM EDT
[#4]
Quote HistoryQuoted: it would be almost impossible for a manufacturer to get the gas port in the groove every time. Krieger does exactly that because they concluded that it does matter.  ... |
|
|
|
Posted: 9/17/2022 7:41:48 PM EDT
[#5]
Quote HistoryQuoted: Krieger does exactly that because they concluded that it does matter. https://www.ar15.com/media/mediaFiles/28568/krieger_gas_port_unfired_03_resized-2529833.jpg ... Cool. I suspect that is rare though. |
|
|
|
Posted: 9/17/2022 7:50:51 PM EDT
[#6]
Quote HistoryQuoted: Krieger does exactly that because they concluded that it does matter. https://www.ar15.com/media/mediaFiles/28568/krieger_gas_port_unfired_03_resized-2529833.jpg ... Is the port chamfered too? It looks like it is... |
|
|
|
Posted: 9/17/2022 7:51:47 PM EDT
[#7]
Double tap
|
|
|
|
Posted: 9/17/2022 7:55:20 PM EDT
[#8]
On a Competition Match Target rifle, it probably makes difference and is a benefit. On anything else, it doesn't matter.
|
|
|
|
Posted: 9/17/2022 7:59:46 PM EDT
[#9]
Quote HistoryQuoted: Is the port chamfered too? It looks like it is... Quote HistoryQuoted: Quoted: Krieger does exactly that because they concluded that it does matter. https://www.ar15.com/media/mediaFiles/28568/krieger_gas_port_unfired_03_resized-2529833.jpg ... Is the port chamfered too? It looks like it is... Yes. |
|
|
|
Posted: 9/17/2022 10:56:58 PM EDT
[#10]
Doesn't matter unless doing a Feamster build.
I'd rather not have an interruption in the driving side of the land though. |
|
|
|
Posted: 9/18/2022 12:00:50 AM EDT
[#11]
Completely in the land or groove is supposed to be the most ideal IIRC. That being said, I still don't care or check.
|
|
|
|
Posted: 9/18/2022 7:35:36 PM EDT
[#12]
I just checked about 20 other barrels and all but 2 have the port on a land. Interesting Stuff
|
|
|
|
Posted: 9/18/2022 8:28:46 PM EDT
[#13]
Quote HistoryQuoted: Krieger does exactly that because they concluded that it does matter. https://www.ar15.com/media/mediaFiles/28568/krieger_gas_port_unfired_03_resized-2529833.jpg ... But does the end user really want to spend the extra dollars on a Krieger barrel or even need the hypothetical and extremely small difference it might make to have the port in the groove? Only the end user can answer that. I have a ton of barrels that all shoot MOA or better and certainly a lot better than I need them to shoot that have the gas ports all over the place. Only a bench rest shooter or SERIOUS long range paper puncher who are measuring groups in the thousandths of an inch for prize money (or really anal bragging rights) would ever want or need such a degree of precision, or be willing to pay for it. There is a reason why every swinging Johnson out there neither wants or needs a high dollar Krieger barrel. |
|
|
|
Posted: 9/19/2022 12:03:20 PM EDT
[#14]
Ahh, Teslong...
Bringing out the inner OCD in home gunsmiths everywhere. I'm not the type of shooter that can wring out any barrel enough to find the difference in accuracy that the gas port location may or may not have. And I am never going to need a $500 or $600 barrel to worry about it anyway. For those that do, buy a barrel that guarantees the gas port in in a land or groove and don't lose sleep over it. Those manufacturers going to that level of detail are also probably doing a lot more QC in other aspects to ensure barrel accuracy. So I doubt hitting what you are aiming at will be a problem. |
|
|
AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm.
Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more.
Copyright © 1996-2024 AR15.COM LLC. All Rights Reserved.
Any use of this content without express written consent is prohibited.
AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own.
