Gunsmithing Plugging an AR gas port

[MrSmith]

I have a subsonic wildcat AR I'm putting together. I set it up with a carbine gas port. I want to change it to a pistol length port to increase port pressure. Is there a way to plug the carbine port and just redrill? Thread, epoxy in a screw/bolt? I currently only have about 6K psi (calculated) at the port and .20" bbl wall. I would rather not buy the new barrel until I can show proof of concept.

Anyone done anything that worked?

Thank you,
MrSmith

 

[Old Man with Gun]

Easier would be to put a gas block on it out of alignment to block the hole.

 

[MrSmith]

Well. In my many hours of overthinking, this simple idea never occurred to me. Much appreciated!

Thank you,
MrSmith

 

[MikeinTexas]

Drill the new port, install the new gasblock and weld A blob on top of the old port?

 

[Hecouldgoalltheway]

You're really not going to tell us about the subsonic wildcat round that you're playing with?

 

[Zak Smith]

most common gas journal is 0.750, minus 0.40, 0.35"

 

[MrSmith]

Sure. .338 into 5.56 case.

And what's 6 thou among friends?

Thank you,
MrSmith

 

[Easy_E]

Just flip the gas block around so the block seals on the top of the barrel

 

[longshot2000]

wire weld does fine. I question the pistol gas setup though. Might be fun to experiment, but the pressures and dwell time is usually problematic.

 

[DeathBeforeDismount]

Yea, the propper way would be to weld and redrill. Just hit it with a mig gun. You could also open up the port if you dont need port placement for some reason.

 

[Yondering]

wire weld does fine. I question the pistol gas setup though. Might be fun to experiment, but the pressures and dwell time is usually problematic.

Not for subsonic rounds. Pistol gas is the way to go.

Reference 300 Blk for example. Or I could point to several wildcats of my own, where pistol gas was the best way to have them cycle subsonics.