I wasn't sure what CTR/MOE buttstock was until I googled it and Magpul came up. I see now what you're talking about, but I was referring more to the tube itself without the "buffer/recoil" feature, which I think is what CAA is offering and I'd like feedback on, or any other aftermarket collapsible stock that doesn't have a spring in it. I'll echo the sentiment on proper firing position/hold and maybe a muzzle break to deal with recoil and jump rather than dampening the system. Anything out there?