I have been mulling over this questions for the past 3 years. I have come to this conclusion: Thompson Center Encore. Advantages: single shot (simple operation) and it hasinterchangable barrels (shotgun, rifle and muzzleloader). Disadvantages: weight, barrel length (24 inch)and (i believe) lack of a safety. I believe that knowing that you only have one shot,youare more likely to make itcount. My son who is 5 now,has a cricket 22. I have plenty of time to refine my opinion, but as of today this is it.