I have an AR-7 by Henry that is at least 10 years old, I've also owned Charter versions as well and the Henry AR-7s are much more reliable. This is one gun that I have considered selling a dozen times or more, I know I can get more for it used than I paid 10 years ago. I always come to my senses and place it back under the seat of the truck where it just belongs. It eats anything and everything, it's the most reliable .22 semi auto I have ever owned. It's accurate range is limited to 50 yards or so, but I can still take grouse at 50 yards with it shot after shot. Mine has an honest 10,000 rounds or more, it looks beat to death but it won't die.
The only modification I have done was to remove the inner action spring. With both action springs installed, I would get the occasional stovepipe with standard velocity ammo. High/hyper velocity ammo was never an issue. Now, many thousands of rounds later, I'm sure it would be as reliable with both as it is with one. I've never felt the need to put the other spring back in.