A Few months old on this thread but some have questioned this set up and suggested a "real" gun. There are several advantages to this set up over a real gun. Having a flare gun, .410 and .22 combined in such a compact package for less than $120 is the main perk. It's a survival gun that weighs little and takes up minimal space in your survival pack/go bag. I would use it as a secondary survival weapon but if you did not have time or space to grab your primary weapon, this will always be ready to go in your go bag. With the .410 shells it seems accuracy and pattern is similar to that of a judge style revolver and more than capable of taking small game. As a defensive weapon you may only get one shot but that is better than no shots. To make this set up really shine, any consistent accuracy that could be attained would be the trick. Rotation of the insert could be resolved by some sort of anti rotational device be it a pin, set screw key slot etc. As the OP addressed, sights would greatly increase the accuracy. A quick add front and rear adjustable fiber optic sights could be the way to go. Do they make some that you could tap and drill for? Are there any "universal add on sights that would be good candidates?