Perm attach 9mm comp/brake

[RDG]

So I'm building a 9mm AR and need to attach perm attach the muzzle brake because of our our wonderful AWB.

I was just planning on pin/weld like my other ARs till I took a look at the threaded portion of the barrel. It's thin as hell. Like .075 including the threads.

The threads are 1/2 x 36.

I really don't think that pin/welding it is a good idea with the minimal amount of material there.

Anyonee else run into this problem? I know there is silver solder as a option but how does that effect the barrel since the material is so thin in that area? I really don't want to have to pay someone to weld all the way around the brake either.

Thoughts?

 

[dnepro-mike]

just shooting some ideas here. depending on the brake design it might be possible to bore out about 1/8 worth of threads so brake sitts further down. then you can drill, pin, weld into the thicker portion of the barrel instead of threads.

similar solution if you don't want/can't to bore out the threads is to cleanly weld/solder a collar to the rear of the brake that goes over outer portion of the barrel just past the threads and again pin-weld through the collar.

 

[RDG]

- - - Updated - - -

just shooting some ideas here. depending on the brake design it might be possible to bore out about 1/8 worth of threads so brake sitts further down. then you can drill, pin, weld into the thicker portion of the barrel instead of threads.

similar solution if you don't want/can't to bore out the threads is to cleanly weld/solder a collar to the rear of the brake that goes over outer portion of the barrel just past the threads and again pin-weld through the collar.

the brake doesn't have enough diameter for idea 1

idea 2 I'm just not thrilled about.

 

[Steelitall]

I'm in process on one myself (PSA kit), thinking I'm probably gonna take it to Northeast Arms and have them do it. Alternatively, i've been considering just grinding/sanding the threads smooth (gotta double check it still meets the length requirements without a brake). Not like the 9mm really needs much out of a 16" barrel

 

[botticelli]

Cut the threads off, and crown the barrel. The brake is doing noting but looking cool, and costing $, on any 9mm barrel

I would assemble completely, then cut the barrel so you can stay half an inch over the limit for overall length