Anyone know the origin of the SIG STS-O81?

[ramairthree]

It came with a SIG556 SBR I purchased.
I recently bumped it with the Romeo deals.
Since I don’t know how to stratify it for sure.

I have T1s and PROS and an Eotech on my handful of serious guns.
Eotech on my serious game gun. I like the FOV. Sue me.

Then, a variety of vortex, primary arms, trs25 etc. on back up, toy, etc. carbines.

I am guessing it is primary arms level.
Trying to tell for sure

Thanks for any information.

https://photos.app.goo.gl/NnvGzaCsggW7L1Ix2

[jason.mayberry68]

It came with a SIG556 SBR I purchased.
I recently bumped it with the Romeo deals.
Since I don’t know how to stratify it for sure.

I have T1s and PROS and an Eotech on my handful of serious guns.
Eotech on my serious game gun. I like the FOV. Sue me.

Then, a variety of vortex, primary arms, trs25 etc. on back up, toy, etc. carbines.

I am guessing it is primary arms level.
Trying to tell for sure

Thanks for any information.

https://photos.app.goo.gl/NnvGzaCsggW7L1Ix2

They are cheap china made RDS's but mine did great on my 556R when I ran it. Not duty ready...but not too shabby. Held zero really well on the x39.