I have had my Charter AR7 since the early 80s, and still going strong. Shot 1000s of rounds thru it.
Now I did find an all steel barrel, slightly bevelled and polished the feed ramp, and replaced the stock springs with stiffer dual bolt springs. If I use hotter ammo it really runs great, however if I do not keep it clean it will gum up and then act up, but shooting a few hundred rounds then cleaning it, ensures it will cycle.
I throw it in my truck when going for short drives in the bush as it will at least have a better chance getting game if needed than a rock.
Kids also love shooting it as its so light.
One needs to remember the design intention and stop comparing it to 10/22s or Marlins which were designed to be much longer life shooters.