The Magpul Industries PRS Lite Rifle Stock will work with a Mil-Spec carbine length and rifle length buffer tube assembly. The Magpul Industries PRS Lite Rifle Stock can also be used with all AR15 and AR10 calibers.
I just tried to install mine on a rifle length buffer/A2 tube. It does NOT work. There is not an extension provided. And I don't see one available to purchase.