922r is basically just a buy American regulation that has the added bonus of letting ATF hassle people selectively. On the other hand, "solvent traps" remind me of wine bricks[1]. Both are obviously legal. Sure you could do illegal things with them, but you could do illegal things with a coke bottle too.

But what does this have to do with illegal guns as any ordinary person understands them? Maybe some Republican bubba's Benelli duck hunting gun is technically illegal because he put a mag extension on it without swapping out enough Italian made parts, but frankly you're grasping at irrelevancies.

Meanwhile, plenty of Democrats in Chicago own illegal sears for their Glocks along with drum mags. Now that's something that maybe we should care about, because those are real criminals hurting real people and not just criminals on paper for violating frankly ridiculous regulations.

[1] https://vinepair.com/wine-blog/how-wine-bricks-saved-the-u-s...