I am currently building on one.
I bought it simply for the looks and it will take some work till it meets all my reqiuirements.
Heavy? Yes, but also extememely solid.
The finish apperars very thin and is uneven in some spots. I don't think the black one I have is even really anodized, I could have done a better job with some alumninum black. After I engrave it I will send it off to be hard anodized.
The forward lip of the mag well will have to be milled about 3/8" at a 45deg angle to accept Beta C-mags.
Has some great flat spots to engrave on, pity the manufacturer found it necessary to use the two largest ones to engrave its info.
Don't know exactly why they engraved on both sides of the mag well (in 3/16" letters) and some of the stuff is engraved again on the grip mounting stub.The springs and detents mount a little differently but a good idea, you don't have to worry about the rear takedown detent spring flying off when mounting or detaching your stock.