Guys & gals, I have shot the M16/ar platform since 1972. While in the military, I just shot them, cleaned them, and shot some more. So it has been a few years since I have been around the AR platform. So could someone explain staking. I have an idea what it is but I am just not sure. I own a DPMS AP4, currently. Don't want to hear negs. about it. It works fine for what I am using it for. Thinking of doing a build, if I can find a decent lower, with out breaking the bank, in light of November 6th. So it sound like good staking is important, if I knew what it meant.