I won't tout the TRS-25 as a great, inexpensive red dot any more. I bought two, both genuine, and have problems with one. The dot will disappear after a few rounds. Mess with the brightness settings and it will come back for a few rounds. Repeat as needed. I'm sticking with Primary arms for great, inexpensive red dots like the MD-RBG II or MD-ADS. And the Sig Sauer Romeo 5 is also a good one.
I had a TRS-25 do the same thing. On further inspection of it, I found the emitter was in a different location then my other 2. So I figured it was a fake.
I replaced the sketchy Bushnell with a Sightmark Wolverine. So far it's been a great little sight. I'd get another one.