1. Will a normal ar15 charch handle fit the 22?
2. Will a ar battery assist lever work on the 22?

1. No. The 15-22 has a shorter charging handle with a longer charging handle latch. This is why.

2. Yes, but it will need to be bent and modified a little bit to clear the trigger area since the bolt release is slightly more forward on a 15-22 than a standard AR15.