If I understand the physics , these are going to be model specific. I was looking at one that would fit my AK but it looked a little bit goofy... for lack of a better word. Plus, there is only a couple places I could shoot a bump-fire and the closest is about an hour drive from the house.
CETME .308 Sporter
Hi-Standard Duramatic M-101
H&R 1874 12 Guage
Mosin Nagant M91/30
It's too easy sometimes to give in to despair, unless, of course, youre talking about politics, in which case you don't really have any other option. Mike Littwin