The way the M&P 15 is set up from the factory you are not going to get all the accuracy it has to offer. You need to get that barrel free floated by changing out the forend to any free float style rail. That will remove all stress from the barrel especially if you shoot from a tight sling. The way it is now, the handguards attach to the barrel right behind the gas block. By changing handguards you can avoid this contact point completely. I really wish you had gone over to AR15.com and looked around a bit before buying. The good news is ARs are incredibly easy to work on and rebuild. There is none of that headspace BS problems you have with bolt guns when you pull and reinstall the barrels. Once you get your rifle, there are so many free float rails out there it can be daunting. Yankee Hill Machine (YHM) makes several in both tactical railed and plain round. If you hunt at night, a tactical railed handguard lets you mount lights or lasers on them, but if only during the day is when you are hunting a plain Jane round free float tube is all you will need.
It takes a minimal number of tools but any smith worthy of the name can change out an AR barrel in 15 minutes and change your handguards. If you find that the S&W barrel is not up to your accuracy standards, the good news here again is you can get a top of the line match grade barrel and matched (headspaced) bolt for under $500. And installing a new barrel is as easy as changing the handguards. I have built over 20 ARs and LR-308s for my own personal use so they are not rocket surgery to build. Headspace will be set by the barrel maker via the barrel extension, and if you buy a matched bolt it is a simple drop in change over and you will not need to check headspace.
A lot of people out there are totally ignorant of what kind of accuracy you can get out of those silly black rifles. My match rifles can do 1/4 MOA easily, and you can get them in calibers from .17 to .50 and use the same lower with nothing but an upper change and in some cases, different mags, but still use them all on one lower receiver.
The rifle as you get it will probably not be the rifle the gun rags write about. G&A and ST have not seen a gun they did not gush over in over 30 years, which is why I no longer subscribe to them. I have never read an honest report from any of them. Do you really think they will trash a bad rifle when just opposite the review is a full page color ad for the rifle they are reviewing? I think not. But the S&W will be a good rifle and should give you 1.5 to 2 MOA out of the box. But you can cut that by a LOT by changing over to a free float tube and a better match grade barrel. For long range yote hunting you do not need chrome lining and M4 barrel profile. Get a good free float tube and match grade 20 inch stainless super match or CrMo super match barrel from someone like Noveske (Pac-Nor barrels) or any number of match grade barrel providers.
You can sink a fortune into these black rifles but they are a world of fun to build and shoot and you can take anything from mice to bears, from 10 yards to as far as you can shoot with the proper upper in the proper caliber.
Welcome to the fold and expect to come down with BRD (black rifle disease) because once you shoot one and see what they can do, your whole attitude toward them will change, and so will your expectations.
Please go over to AR15.com and look around. There is a world of information there and don't be surprised if your next AR is one you build yourself.
By the way, if you want the proper eye positioning on that scope you could not do any better than by getting a set of Warne Ultra High AR Maxima QD rings. They always return to zero and can be removed quickly for storage and cleaning. They are very high and will put the scope at the proper height without the use of risers, which only adds another piece of equipment that can loosen up and ruin zero. Get the ultra high rings and you will be good to go with that scope. I have the Leupold 2-7 on my .358 HDH LR-308 and the 1.75-6x on my .458 SOCOM AR-15, both of which are my main hunting rifles. The Rhino below also wears a 1.75-6x in Ultra High QD Warne AR rings. As you can also see in the below picture, TROY BUIS sights fit easily under the scope eye piece.
Beauty is in the eye of the beholder.
You might not think my .470 Rhino is beautiful, but I love it, and just let an elephant tromp through the garden. His tusks will be MINE!