When I still had my .40 version I had looked at some way to adapt a pad to it. It was so much fun I would easily burn a couple hundred rounds at an outing. Then next day my shoulder would hurt all day like I had been hit there. An amazing amount of recoil from a little hand gun round. Even the 9mm version I kept is too much for the Wife. She was the reason I originally bought it. Just too uncomfortable for her. Would have gotten rid of it but found out how impressive the ballistics are in the 16" tube and good ammo. So kept it for me and sold the .40. Crude is certainly a great description alright. I paid less than $300 out the door new though so only expected so much. The newer Ruger is miles above in quality and fun but still keep the little KT because of the folding. If I wear out the Gen 1 I will get a Gen II to replace it. They did do some nice stuff on the Gen II.By the way, when I said that "The stock is uncomfortable, the trigger is terrible, the sights are primitive", I didn't mean to say that it isn't still fun to shoot. It's a lot of fun. I can easily ring the gong every time at 100 yards, and burn through a lot of ammo in a hurry. It's just not very comfortable to shoot.
If you don't need the folding part, and like PCC's in 9mm, take a look at the Ruger. That rifle has been the best money I ever spent. It comes ready to use a couple different kinds of mags with a 3d one sold by Ruger. They were real hard to get for the first year or so after they came out. Now you can easily buy one since they finally caught up.Thanks. These comments based on real experiences are very helpful.