While that’s possible, drilling is a little trickier than it would appear.
We generally work with customers to swap sizes if we don’t nail the size on the first try.
Like everything, it depends on on duty cycle and gas system length.
We’ve got one test going with a 100% suppressed carbine still in spec after 4000 rounds.
For now, let’s call it ~5000 rounds expected useful life.
While that won’t win any endurance record bragging rights or .gov contracts, it’s actually completely adequate for 90% of users.
We have other solutions for the 10% with higher round counts or duty use.
The EZTUNE Gas Tube is a simple, effective solution that solves several problems really well.
Fair enough.
On that note, after having been out for awhile, any feedback on expected life span of the vented set screw/FSB option?
I made my own for an overgassed 10.5 but it’s not something I use with any regularity or to any high round count so I haven’t even thought about burning it out. Although I suspect it will last longer then a tuned gas tube.
I love the concept of these tubes. But my question is, where does the extra gas from the barrel port go? Will this carbon up the gas block or will the gas actually stay in the barrel and exit the muzzle?
It works essentially the same way as a small port in the barrel.
The small port limits the amount of gas flow into the tube and controls the impulse use to cycle the action.
Anything that does not go down the tube goes out the barrel.
With the EZTUNE tubes, there may be a small amount of carbon buildup in the non-critical areas of the gas block that does not affect function.
Does the gas tube erode around the area near the gas port that is not going into the port in the tube?
I hope that makes sense…
A normal gas tube has a larger hole than a gas port in the barrel. Therefore, the gas port is shooting gas into the solid part of the tube that would usually have a hole.
Yeet yeet Clint! straight gas tubes for MRP/MWS!? You are such a problem solver!
Here is a carbine length EZTUNE Gas Tube after 4000 rounds suppressed, including some limited F/A.
The base barrel is a 10.5 carbine with an 080 gas port!
There is a “blast ring” which matches the size of the passage in the gas block that seems to exhibit a combination of pitting and buildup.
The edge of the port is slightly rounded from erosion, but the port itself still pin gauges as new.
Do you have an idea for gas-tube regulating hole sizing on 16” mid chrome .308 MWS barrel? Suppressed. I have no idea what the port is in the barrel, I have heard as large as 0.093”.
Yes, we have a good starting point.
Jumping on the BRT tubes are awesome bandwagon.
Very precisely made, so much so that after thousands of rounds, I had no issue removing the gas tube after some wiggling.
I’ve removed a lot of “mil spec” gas tubes that froze up with carbon or copper fouling, no gas tube wrench or penetrating oil would free short of destruction.
Clint really knows his stuff.
Got my tube installed today. Had to put the old tube in the vise with soft jaws and tap on the back of the upper with a rubber mallet to dislodge it after removing the roll pin. Those carbine tubes get crusted in place pretty good. Can’t wait to test my buffer collection with a reduced port size.
My tube is en route.
I’m going to compare my 12.5” CHF Noveske with my 2 BRT barreled (14”&11.5”-s) rifles next weekend at our night fire classes.
I’ve needed one of these for my 733 clone for a while. The only suitable barrel I could find for my clone was a Spike’s and the gun is wickedly overgassed. The BRT tube is on my short list of “must buy” items when I get my bonus in a couple weeks.
Just ran 30 rounds through the old 14.7" pinned carbine with the new .0635 EZtune gas tube. Huge improvement to have it properly gassed. My M855 clone (62gr fmj ~2780 fps in my gun) reloads functioned perfectly and ejected between 3:30 and 4 o’clock with either an H or an H2 buffer with springco blue spring. The H2 locked back fine on empty and had slightly better ejection pattern so I will stick with it over the H. I normally run brass cased hotter reloads. Tangible improvement. Thanks Clint.
I’m thinking of using your gas tube for a my 13.7" midlength Noveske 5.56 barrel. The port is .086 on a .750 gas block journal, and the barrel is very over gassed. I’ve been using an SLR adjustable gas block to tame it. This Barrel is shooting suppressed 95% of the time.
What port size gas tube would you recommend, please?
Not Clint but .073 may be about right if suppressed. If you order they will pick a size for you
When you go to buy it there is a questionnaire you fill out and the system will determine the right size for you based on your answers.
Clint these look like a great option. Very well done.
Oh, very cool. Thank you.