supressor adapter issue

[ANGUSLINCOLN]

I have a Gemtech .22lr suppressor that I fit onto my Sig Mosquito using a threaded adapter. The adapter has become securely fastened to the threads of the suppressor and I cannot get it loosened up to remove it. Has anyone dealt with an issue like this and have a solution to removing it from the suppressor ?
Any suggestions would be greatly appreciated ! Thanks...

 

[wally]

Soak it in a good penetrating oil, like Kroil, overnight should be enough. Then turn the suppressor with a strap wrench and use good a good padded vice on the adaptor.

I had to do this to get the GemTech tri-lug adapter off my Uzi barrel after my initially test firing -- I had only one adapter initially and wasn't sure which I would want to use more, the Uzi or 9mm AR SBR, until I found more adapters.

 

[ANGUSLINCOLN]

Thanks Wally, but the adapter is threaded into the Suppressor and it's base is flush with the suppressor. There is not a surface to hold on to the adapter. The penetrating oil may be helpful, but I need a way to turn the adapter counter-clockwise and back it out of the suppressor threads.

 

[btg3]

There is not a surface to hold on to the adapter.

Screw extractor? If so, it may mean sacrificing the adapter.

 

[wally]

Screw extractor? If so, it may mean sacrificing the adapter.

Before I sacrificed the adapter, after the penetrating oil soak, I'd degrease the barrel and adapter threads and put it together with some blue Loc-Tite. Let it set overnight to harden, then you should be able to hold the barrel in a padded vise and unscrew the suppressor. Once the suppressor is off, you can heat the adapter to about 400 F and release the Loc-Tite.

OTOH if the gun takes down for cleaning with the adapter screwed on, I'd leave the Loc-Tite alone, and maybe use red Loc-Tite instead (which still could be released with heating to about 500 F).

 

[ANGUSLINCOLN]

That is what I am thinking too...it was an inexpensive adapter but I am wondering if it was a factory issue. I have yet to see if any of my local machinists have an answer for me.

 

[Hunter125]

I don't know if this is feasible or not, but could you find a bolt with the correct thread and lock a nut agaist the adaptor for when the penetrating oil does its work? Might give you something to hold on to while you get it out.

 

[ANGUSLINCOLN]

Thanks Hunter125, I will be going to the hardware store shortly ! I had thought of that earlier, but I need to match the thread size with the correct bolt size.

 

[wally]

You might have better luck at a large automotive supply store as odds are its a metric thread and larger in diameter than most hardware stores carry, if its not the "standard" 1/2" x 28 thread (you likely wouldn't need the adapter if it was). Although our local ACE hardware has a good selection of metric threads.

 

[Prince Yamato]

I had the same problem with a Walther P22. The adapter gets stuck in the can.

The adapter attaches to the pistol barrel with a tool, correct?

-Lock slide back
-Attach adapter to barrel
-Hold barrel to attached adapter with tool
-Unscrew suppressor from adapter

 

[ANGUSLINCOLN]

No, the adapter is hand threaded onto the barrel. Normally it stays threaded onto the barrel , but this time it stayed inside the threaded suppressor and seems to be very resistant to counter-clockwise rotation that would back itself out of the suppressor.
I am on my way to an auto motive supply to find a finely threaded bolt of proper size. I intend to thread it into the adapter using blue Loktite and letting it cure over night. the moment of truth and hope will be sometime tomorrow morning.

 

[atomchaser]

I'm sure you are aware of it, but always put anti-seize on the threads when connecting the suppressor to the adapter or barrel. Otherwise the treads get leaded up and you have problems.

 

[ANGUSLINCOLN]

Well, I did not find a bolt that would match the threaded dimensions of the barrel at either an auto parts store or a hardware store. I decided to just use the barrel itself and Loktited the adapter stuck in the supressor to the barrel itself. After a few hours, I turned it counter clockwise and it came off !!
But now I will attempt to remove the adapter from the barrel. I am thinking it should release after I heat it up a bit...

 

[pikid89]

since the outside is 1/2x28, 2 thin bolts used to lock against each other would be enough to just use a wrench to remove it from the barrel. Blue loctite does not need heat to be released, just enough torque....thats why people use it on scope bases

 

[ANGUSLINCOLN]

Thanks Pikid89, I will try it without the heat !. For now, I am happy to keep the adapter threaded on the barrel.

 

[wally]

I'm not all that familiar with the SIG Mosquito, but fixed barrels in ZMAC alloy frames (like my Walther P22) won't take a lot of torque. I'd recommend heating it first -- remember you have a lot of area on those ~1/2" fine pitch threads, much more than you'd have with scope base screws.

IF you don't need to remove the adapter, I'd say don't until it is required, the heat of shooting may help release the Loc-Tite.