I have been looking for one of these, but it seems everyone is out of stock.
i'm just getting into AR's, so i'm no expert. but i recently purchased the M&P sport and i have had great experiences so far.
i put a cheap(ish) red dot on it & its getting 1.5 groups at 50 (which is good for ME with no magnification). i have somewhere around 400 rounds through it with no failures so far. don't miss the forward assist or dust cover AT ALL.
the one thing i have noticed is, without a heat shield in the hand guard, it can get HOT. but you can just slap on a forward grip or replace the hand guard, so its really no big deal imo.
and i agree, they are hard to find. i had saved my pennies and went looking. academy did not have one in the state of texas....

. everywhere online was sold out. i had to go to cabelas and pay $20 more. but the worst part was, had i not called to hold the gun, it would have been sold before i got there (within an hour).
