No but DS has them for $275
http://www.dsarms.com/DSA-ZM4-Forged-7075T6-A3-AR15-Upper-Receiver---DSZM4CBU/productinfo/DSZM4CBU/
http://www.dsarms.com/DSA-ZM4-Forged-7075T6-A3-AR15-Upper-Receiver---DSZM4CBU/productinfo/DSZM4CBU/
I am going to order some lowers this week and start stocking them. I have a few people that want to start trying them. I have no issues with the polymer lower . We were hesitant when Jerry Miculek first showed us the polymer grip on the STI pistols but they were fine. All I would change is the LPK on these.
Does JSE still have the uppers? I looked the other day and can't find those that were going for 335 anymore.