You know now that you mention it.. There was company out here in Sedalia Colorado, that built match grade recievers for AR/ 10's and 15's called BOHICA... I have one. I had forgotten all about them until this post jogged my memory..
From the ACAV, FIDO
Armored Cavalry
F@#k it Drive ON!
Or as the brit poem goes..
Get In Get out quit Mucking about.. F IT! Drive ON
Crazy Brits anyway..