That's a good deal. My first AR was an M&P-15 - ran like a champ through practice and classes.
Stock, quad-rail, front sight - not my cup of tea but they work - I replaced it all. 1:9 twist 16" barrel. Receivers are tight, bolt is solid. Just works.
I'd MUCH rather have this than some frankengat - and I've built some frankengats for various reasons (300 AAC Blackout, AR-9, pistols, rifles, etc.)