Once a while, I saw BOHICA's lower receiver floating around the web. They were a low volume producer, and had set up their machine to produce 500 or so lower a few months before the Federal AW ban.
I actually knew the guy who owned and produce these receivers, and yes, he knows what BOHICA meant and was using that for all the regulations he have to follow to stay in business (and eventually went out of business), screwing a few people including his partner while he was at it.
Back to the receiver, they were "reverse-engineered" mill receiver using 6061-T6, not 7075-T6511. He never did had the drawings to get all the dimension and tolerance issue worked out, so some fare amount of hand work is required to put together a reliable weapon.
I hope you did not buy the receiver.
leungken