Own 2 10/22's and one 15-22. My 10/22 target is more accurate and the plain jane carbine is probably a better hunting/woods gun, but I just don't shoot them much since I got the 15-22. My main intent was to familiarize with the AR platform at a reduced price and still have most of the features the "real" gun has (no bolt cover, or forward assist). Guess it all comes down to what you want to do. M&P is good enough to train for Combat accurate AR carbine (3-4" @100 yards).
For those wanting match barrels, S&W custom shop builds a performance center 15-22 with a tighter chamber. May get you what you're looking for.
For those wanting match barrels, S&W custom shop builds a performance center 15-22 with a tighter chamber. May get you what you're looking for.