I have taken mine apart, and can't say if it is full aluminum, but it is definitely partially aluminum going through the stock. I actually like the stock quite a bit. Are there better ones out there? well yes. However, Not many that come on factory production rifles in the same price range. Much of it will come down to preference, but I have been pretty impressed on the .300 Ultra Mag thus far. Probably have about 100 -125 rounds through it so far.