What facts do you have to justify that a SJD parts rifle is "as good as" a rifle from BCM? I am going to go out on a limb and say you have no clue....that is not an "opinion"...
By definition that last comment was an opinion....just saying.
Per my first comment...I have bought a couple upper/lower receiver sets for $220 and built rifles and the quality and finish of the receivers are as good as the other manufacturers I mentioned ..no where did i say that I was using lower parts kits, triggers or anything else from SJD and to my knowledge they don't even offer complete guns or parts kits anymore.