Hey guys, I have an sp1, b,c,ch, 11.5" barrel w/ 5.5" compensator/flash hider,not permanantly attached. I want to trade this upper for a complete post ban upper. Preferably a 16" post ban upper, but am willing to take anything into consideration. If nothing else have a great christmas and keep drinking. I know I am......I just graduated!.....BS....is that Bachelor of Science or Bull Shi*!....????