The double-barrelled shotgun (not the sawed off 'pistol' one) with incendiary shells is very effective against both pickups and choppers in range (~100 feet). (I like it moreso than the pump shotgun models, because you can switch out shells really fast as needed, and it seems to pack more of a punch)
EDITED: 6 Jan 2020 15:47 by DSMITHHFX