Starting to piece my AR together and I'm debating between which stock I'd like to use. Problem is I can only go off pictures I have. I don't have a clue where to start looking, what these stocks are called, or how much they may run me. Here are the ones I'm looking at: (AR in the front) Are there any ones similar to this for AR's? Or would one like this from a shotgun work? OR should I just stick with a regular 6 position stock? Any good spots to buy with buffer tube/spring? Going to build the lower this year and get the upper whenever I get money.