Never heard of them. Just took a quick look at their website. In the customizable upper section they only offered a 1:9 twist barrel in 5.56 and the only handguard option beyond stock was a drop in UTG rail. Not. very custom. And they use something called a YHM "style" gas block? Either it's a Yankee Hill part or it isn't.
Sounds like they use mid or lower level parts. I think you'd be better off with a product of known origin. A DPMS, Stag, S&W, CMMG or similar is going to give you at least, or likely better,reliability, performance and durability.
Only way to know for sure what kind of parts they use is to call them up and ask. If they hem and haw or don't want to give you specifics, you might be better off spending your money elsewhere.