Mi Sabot, I know you asked of iron sights and Sportys but I have a Tasco red-dot on mine.
For plinking? Go get one. Great for new shooters, put the dot on what you want to hit and squeeze the trigger.
I understand about teaching kids how to use iron sights but the red-dot IS fun.
I leant my Sporty to a bunch of little leagers at a fun day once. After figuring out hold over, they were hitting Rams at 100 yards with regularity. This was with Rem Golden bullets, the red-dot and a sandbag rest. They had a blast.
Hope this helps.
Nixter