A few months ago I bought what was advertised as a Silencerco Omega ASR flash hider. All went well at first and I received it quickly. However, the good part ended soon after. I attempted to mount the can on the flash hider and it just wouldn't go. It appears the threads didn't match up or something. I'm not sure but either way it wouldn't go on. The can did go on my friends mount. So I know it's not the can. I attempted to reach out to Rainier Arms several times via email and at first they responded quickly. They asked I send a picture of the flash hider to which I promptly did. They told me it should work and that was it. After I replied saying it didn't work, they quit responding. After several attempts to make contact with zero responses, I'm here to see if anyone has had the same problem with them and if it was ever rectified.
I tried posting in another section. Another user pointed me in this direction. Hope it works.