Any Reign supreme mfg (RSM) AR barrel experiance?

[srawl]

Im building a 300 blk pistol and i found these on ebay for less than $100.

I know sometimes you get what you pay for, im just hoping these are a good value.

Its a 8" with 1 in 7 twist.

 

[Zerodefect]

Tons of good cheap .300 barrels out there for some reason. They do shoot well. I use MAS defense for .300blk. No idea where these barrels come from.