Thanks, but if I'm going the DD MK18 route I feel I am going to spend the extra $20.00 and support Purpose (but in addition pay back OH tax).   I did Test the G&R web-site and tried to insert the Colt uppers on the cart and acquire the out of stock message.The Colt LE6943CQB and CR6943 Monolithic quick barreled rifle aspect's Colt's regulation enf