Re: puchasing ar15 lower in northern iowa
If the lower is the part with the serial number, then it counts as a firearm under BATFE rules. BATFE generally considers the reciver of a rifle to be the actual "firearm" part of the weapon.
History is much like an endless waltz. The three beats of war, peace, and revolution continue on forever.
Inter Arma Enim Silent Leges - Cicero
If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen. - Samuel Adams