http://www.fulton-armory.com/
The M14 and FAR-308 (DPMS compatible AR10) receivers seem like particularly good deals. The AR10 receiver is machined from billet.
Fulton Armory Precision Investment Cast and Machined M14 Receiver: $ 419.95
Fulton Armory Precision Investment Cast & Machined M14 Rear Lug Receiver: $ 549.95
Fulton Armory Precision Forged and Machined FAR-15 Lower Receiver: $89.95
Fulton Armory Precision Machined Billet FAR-308 Lower Receiver: $ 249.95
Fulton Armory Precision Forged and Machined M14 Bolt w/Roller: $ 149.95
Fulton Armory Precision Forged and Machined M14 Operating Rod : $ 172.95
The M14 and FAR-308 (DPMS compatible AR10) receivers seem like particularly good deals. The AR10 receiver is machined from billet.