I am a disabled person with, among other skeletal abnormalities, limited mobility in my thumb and fingers. I feel I am only able to safely and effectively operate rifles with a thumbhole stock or pistol grip, due to the unique shape of my hands.
Joe, that's a very good point. I am not a lawyer, but what I would do is eliminate the "feel" to "can't". Can you operate a rifle w/o a thumbhole but with a pistol grip? Have you shot a thumbholed rifle and shown a marked improvement?