On Friday Dec 1st I purchased my long awaited first AR-15, the S&W M&P Sport II - Optical Ready. Among other furniture I purchased a Magpul MOE Carbine Stock-Collapsible. I took it to the range yesterday for our first date. I spent the first 20 rounds dialing in the red dot I purchased, from a seated position and using a block. Once I felt that I was as zeroed as I was going to be able to get, I stood for the next 80 rounds. I felt very unbalanced, not to mention uncomfortable. The rifle felt extremely close to me, as did my arms. In short I felt all balled up. Also to get my cheek in a position that felt comfortable my ear protection would be raised to a point that I had no protection. I had the range master measure my length of pull and the rifle. The rifle is at 13.5" where I am 14.5". He really had no insight on options for gaining an inch, and the smiths were off this weekend. So here are my questions. 1) Will the Magpul Cheek Riser fit the stock that I've purchased or is it only good for the Fixed Magpul stocks? 2) Will the DPMS A2 Buttstock Spacer work with my stock? And will it cure my length problem? 3) If the answers to one or both of the questions is No, what other options are available to me? Thanks for any and all help. I have a lot to learn, and there are many more upgrades that I want to make in the future.