Ok guys, I'm brand new to the AR-15 world but just had to buy one before the ban is executed. So my M&P15 300 Blackout came in today and now I need to find a scope for it. I've always used Leupold's or Bushnell Elite 3200's on all of my deer rifles but have no clue what to look for in an AR scope. I will be using this gun for ground hogs and plinking (out to 500 yards). I'm thinking I need a BDC reticle but not sure if there is one calibrated for the 300 Blackout. I see that Nikon makes one for the .223's, will this work with the 300? If not, what would you recommend? My price range is $200-$300. Thanks for any help in advance.