Threaded Barrels

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RyanMumbles

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Hello all, I recently purchased a PPQ M2 with a threaded barrel. The problem I'm encountering is that no matter how much I tighten it the thread protector backs off during shooting.

I've thought about putting on some locktight, how does that work when the barrel heats up so much? Any other ideas?

Thanks,
Ryan
 
I just take the thread protector off while shooting mine and put it back on once I've returned home, cleaned it, and I'm going to put it back in the safe.
 
I don't want to use lock tight on mine as it just makes removing the cap more of a hassle and you need to remove the cap to take down the pistol for cleaning.
 
Yea the linear comps I bought had crush washers, but now that I think of it my thread protectors do not. I guess blue locktite is your only option. It comes right off when it's dry and flaky so I wouldn't worry about it too much as far as cleanup is concerned. I usually use red, but very very very little (next to non exsistant)
 
It won't get hot enough to melt the Loctite unless you're mag dumping. It needs to get up to around 300F before it liquefies.

If you need to remove the cap for cleaning then Loctite would be a bit of a pain to have to clean away and replace each time. Instead go around to a sport shop that has cross country ski equipment. By a little stick of the really soft and gooey wax. I think it was called "Klister" or something like that. Another option for something similar would be surfboard wax. It goes on and stays soft and gooey so the surfer's feet don't slip on the board. Either way "crayon" this soft but gooey wax onto the threads and put the cap on.

The cap will still come loose but the stickiness of the wax will hold it from moving very far. Best of all it will let you unscrew the cap easily for cleaning and the wax will clean away easily with the usual solvents.

I've got the same issue on a .22 rifle barrel that came with a cap. I'm going to look at this as an option.

Another method would be to put a single turn of something like nylon monofilament fish line around the joint and tighten the ring down against it. It'll act like a shock absorbing crush washer.

Rubber bands won't work. Not tough enough. But a small size O ring might do the trick.
 
Good thinking! An O-ring would be temp resistant and act like a crush washer, I don't think the surf wax will hold up to the heat in my opinion, but May be worth a try
 
You're probably right. It would likely melt when warm. Almost certainly now that I give it a second thought.

Small section O rings aren't common in the usual hardware stores. But with a little searching I'm sure that folks can find some that are small sectioned. Like .030/1mm or so by a diameter which is a little smaller so it stretches and holds in place.
 
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