I’ve never seen a three lug on pistol. Usually a three lug is on something like an SMG or a carbine of some sort, where heavy fire is expected. As Theo said, the loctite solution is an imperfect solution. Too much and you’ll glue the can, too little and you just end up lubing the threads.
I do hate direct thread silencers, but for pistols, I’m not sure if there’s an alternative on the market. There might be, but I’m not aware of one. I’m also not sure that there can be a solution.
I imagine some sort of solution where there is a mount that just reverses the threading, so that the silencer doesn’t spin off. But then that would require manufacturing the silencer with a reverse threading, and if you lost the mount, you’d be screwed.
In the end, I think the problem that we are discussing doesn’t have a perfect solution bc the ‘problem’ isn’t part of the original design. Meaning, a pistol silencer wasn’t originally designed to be used with hundreds of rounds and magazines upon magazines of fire.
An analogy...
A while back I called Mike at TSC machine, who is super knowledgeable about MP5s, and I complained to him that my MP5SD wouldn’t last hundreds of rounds without losing efficacy. After a mere 200 rounds, it gets louder and with another 200 rounds, the thing gets possibly carbon locked. He warned me not to shoot it beyond a couple hundred rounds without cleaning.
So I was like, ‘what the hell, I have a gun I can only run with 200 rounds?’
I asked him how to fix it, and his response was that the SD is a commando gun, designed for a short mission, and it was never designed for range warriors to shoot 2000 rounds on a weekend range trip. It needs a cleaning every 200 or so rounds. That’s the downside of a factory spec SD.
Granted, the solution is to get an SD made by RDTS, which can go thousands of rounds, but those aren’t HK spec SDs, and the RDTS SDs can not be disassembled at home. So it’s not a perfect solution.
Bottom line is there is no complete solution because the thing was designed for something that isn’t compatible with our objective.
So in the end, we just need to keep checking the silencer to make sure it hasn’t unscrewed.
But I’m not a silencer expert.
Is there a perfect solution, Theo?