Very much so. You won't need power tools, and depending on how "fancy" you want to be, you could probably do most of it in 20 hours. Probably the most time consuming part is cleaning and smoothing the metal fixtures.
You can go quite a bit further if you want, though. The stocks are a little "proud" or oversize compared to the factory version, even if the parts will fit. Slimming the stock to factory dimensions is worthwhile, and that will take some rasping and sanding. Last one I did I wanted it even slimmer than the factory version, so I must have taken off half a pound of wood all-told. Maybe more. While the factory 54 actually weighs less than the factory 50, my 50 weighs less now than a factory 54.
Lots of advice floating around on them, so I'm not going to rewrite the book. Just take it for granted that there are lots of folks willing to help if you have questions or need ideas. It's a real worthwhile project.