At
http://secure.netsolhost.com/314847....tegory_Code=M1
RPB sells semi auto M11/9 parts kits with frame weld packs (80% receiver) for $230. I called them to ask if you could use steelaloy to weld it together and they said its what they use at the factory.
I've heard allot of bad things about semi auto copies of open bolt SMG's, but would it be worth $230?