Too much passive voice in the narrative.
That's true, as far as it goes, but this isn't a news piece and Mr Dean Weingarten is too seasoned and stalwart a defender of 2A/RKBA to be casting him adrift because the dangles the occasional participle.
There aren't many who have a platform as visible as his who still can be counted to shoot from the hip and not couch their opinions in the interests of his sponsors. In my view that qualifies him for a bit of syntactic leniency.