navylawdog :
I saw your thread and i wasn't going to say anything because i knew very little about this.
I have seen the K3B in Gun stores and i know a guy who has one ,but i never have shot it ,but he likes it and he fires Wolf through it.
Remember the AR is the Chevy 350 of rifles now.
About everyone offers one.
A lot of company's buy their receivers from a few places that really make them ,they put their own finish and Name on them after that.
But most of them are built to to a certain spec ,unless you start tricking them out.
My FFL has sold a few of them and none have come back so ,who knows.
I wondered about my Bushmaster M4 when i bought it cheap.
It turned out to one of the best guns i ever had.
If you buy it ,let me know about it OK ,the price is attractive.