Suppressors Suppressor adapter thread engagement

[sjbryan65]

Bought a rearden atlas alpha for my OSS Rad 9. When threading it into the can I only get about 2.75 rotations before it is bottomed out and tight. Is that enough thread engagement or should I be looking for another option?

This will be shot on 9mm and .22 only....

Thanks!!

 

[longshot2000]

Does not sound like enough of a fit, but also unusual for Atlas and OSS (which are quality products). Are you sure you have matching thread pitches? Is this for a pistol?

 

[sjbryan65]

Yea it is a 1.375 diameter pistol can. I called rearden today and they said it was borderline on being enough engagement. The thread pitch is correct 1.125x28.

Rearden said they were aware of this issue with the Rad 9 and a few other suppressors and would be coming out with a mount made specifically for them soon.

Come to find out the rearden barrel adapter won't fit inside of the 21mm socket used to install the handguard nut inside of my scorpion handguard anyway which makes the setup I was going after impossible anyway. That being said I am going another direction.

 

[Threadcutter308]

Yea it is a 1.375 diameter pistol can. I called rearden today and they said it was borderline on being enough engagement. The thread pitch is correct 1.125x28.

Rearden said they were aware of this issue with the Rad 9 and a few other suppressors and would be coming out with a mount made specifically for them soon.

Come to find out the rearden barrel adapter won't fit inside of the 21mm socket used to install the handguard nut inside of my scorpion handguard anyway which makes the setup I was going after impossible anyway. That being said I am going another direction.

It sounds like "someone" is "out of spec" with their machining. Don't know which vendor.

Doesn't sound like your issue, but if both mating parts are stainless, use a good quality anti seize compound on the threads. Otherwise

 

[sjbryan65]

It sounds like "someone" is "out of spec" with their machining. Don't know which vendor.

Doesn't sound like your issue, but if both mating parts are stainless, use a good quality anti seize compound on the threads. Otherwise

Everything is in spec. The problem is the Rad 9 is made slightly different than most other 1.125x28 threaded pistol cans. The threads are slightly recessed inside the main outer tube as you can see in the picture. The oss mounts recess and fit flush under the outer tube and the rearden mount does not it interfaces on the outer tube therefore not letting it thread very far in. So nothing wrong with either just a slightly different design on the Rad9 making it not an ideal match with the Atlas Alpha. Rearden is already working on a new alpha atlas that will be made specifically to work with the Rad 9.

 

[Threadcutter308]

Everything is in spec. The problem is the Rad 9 is made slightly different than most other 1.125x28 threaded pistol cans. The threads are slightly recessed inside the main outer tube as you can see in the picture. The oss mounts recess and fit flush under the outer tube and the rearden mount does not it interfaces on the outer tube therefore not letting it thread very far in. So nothing wrong with either just a slightly different design on the Rad9 making it not an ideal match with the Atlas Alpha. Rearden is already working on a new alpha atlas that will be made specifically to work with the Rad 9.

My primary point was that if both parts are stainless, use a good quality anti-seize compound on the threads.

 

[sjbryan65]

My primary point was that if both parts are stainless, use a good quality anti-seize compound on the threads.

Gotcha. Thanks for the advice.