Probably the gun I shoot the most now is the Ruger SR22.
I have a Crimson Trace laser on it, so I shoot it day and night (home range). Liked the gun so much I bought a spare.
Also the .22 AR-15 replicas are cool too. Anyone have one?
The S&W M&P 15-22 has the exact same control as the AR.
I have mine set up exactly like my Bushmaster HD AR.
I use the S&W as a primary (low cost) AR trainer. In the first couple months I owned the 15-22 it paid for itself n .223 ammo savings.
It's equipped with a Streamlight TLR-2 laser/light, so it is a day/night practice gun.