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.
I can’t help it. When Word Perfect 5.0 for DOS came out, it included a grammar checker that compared my writing to Hemmingway, the Gettysburg address, and an insurance policy. It also noted all use of passive versus active voice.
It regularly called me vague and pretentious for overuse of adjectives. (Plus, my mother was an English teacher.)