Gary is right about the upper details. I had a talk with the rep at Knob Creek last spring and he said that the difference in the bolt is the the hole is drilled upsidedown so that the cam pin can be inserted 180 degrees. This is an A2 upper and my lowers are preban, so no problems there. I've also got an ambi safety on the lefty gun. DPMS makes those also. Getting ready to order another one for the other AR. E-mailed off for info on the Norgon Ambi-Catch. Mykl says its a good unit. That's good enough for me. See the thread on Norgon for more info on this unit. As per cost, I got mine at dealer cost because it took so long to arrive; dealer $325. I ordered the beginning of June and it arrived on Friday. We were originally told that it would take 3 to 4 weeks for delivery. Every time we called we got an excuse; for the first two or three months they were waiting for enough lefty orders to make a production run, then they couldn't find anyone that could meet their specs on a receiver, then there were heat treating problems with the receivers, then heat treating problems with the bolt, etc. I'm thinking of grinding off the now non-functional shell deflector, will investigate further before any action taken. Hopefully will get to range this coming week.
One other thing; when it arrived it was coated in something that neither my shop nor I have ever smelled before. A rather thick viscous oil. Have cleaned out already. DPMS website is www.dpmsinc.com
[This message has been edited by fal308 (edited 12-20-98).]