Suppressors Do I have a problem ?

[RollinCoal11]

Have a new a JP LRP-07 that I took the brake off of to install my Ultra 9 and this was as far as I could get it on. Don’t see a washer or anything on the threads.

 

[Zak Smith]

Take a picture of the threads, side on. My bet is that it does not have a thread relief cut, check it against this thread print
https://thunderbeastarms.com/tech/thread-specifications

 

[FatBoy]

Take a picture of the threads, side on. My bet is that it does not have a thread relief cut, check it against this thread print
https://thunderbeastarms.com/tech/thread-specifications

You can see the taper of the thread rolling up into the shoulder if you zoom in.

 

[RollinCoal11]

Ok . Looks like it has a huge undercut

 

[RollinCoal11]

LOL, guess I didn’t notice that while putting it on

 

[Waorani]

Looks like overall thread length may be too long.

 

[FatBoy]

That's odd where the parkerization is rubbed off by the shoulder. Could be long. Did it have a brake on it with a spring/crush washer?

 

[RollinCoal11]

It had a brake on it

 

[RollinCoal11]

Do you think some peel washers would fix it ?

 

[B y r o n]

The TBAC print shows 0.600" from shoulder to end of thread, what does yours measure?

 

[FatBoy]

Do you think some peel washers would fix it ?

Probably not. I'd take some measurements and compare them to Zaks print.

 

[c ward]

Do not put peel washers between the face of the suppressor and barrel shoulder , it is not designed to function like that .

Have the threads checked and make sure they are in spec . TBAC cuts their threads to the spec in the drawing and religiously checks them with thread gauges multiple times before shipping .

Make sure when the barrel threads are checked it is with a proper in spec gauge , they wear over time and have to be calibrated periodically, or a thread mic or a set of thread wires .

 

[AIAW]

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What these two gentlemen above said, exactly.