Hey everyone im new on this form picked up a new S&W M&P 15 a few weeks ago its got the police package (barrel, stock, flash hider etc) Yes i am LE i love my job i would not want to be doing anything else. just a few questions about my new rifle. how much oil is required on these things. I have gotten mixed results from friends but am afraid they dont know all to much about it. Also it is an optic ready rifle at the moment i have some cheezy red dot on it but that NEEDS to go. suggestions. maybe you have something that you think is awesome. any feedback would be awesome.