i here the judge shooting the 410 shell is a beast. kel tac is the one that makes the ksg however i am waiting til the price comes down. they originally had the price at 800 but with the demand so high they are selling for about 2300 if you are lucky enough to find one. when someone finally got there hands on one they were selling for 2800 on up. personally its just a want. i didnt really like the feel of it i would change the stock out if you could. its interesting that the shells load behind the trigger. as far as assault rifles i am looking at the Grendel 6.5 but havnt decieded yet on that one.