Vltor, KAC or indeed top choices in the high end AR market. Honestly the KAC does nothing for me though. I know they make good products but, I think someone buying an AR is like someone buying reloading equipment or vehicles. People buy Fords, others Dodge, Chevy, Fiat, Mercedes, etc... I'm planning on building a Mega ambi in 308 next year, but this years project is the AR-15. I still can't pry my eyes off the Vltor though. 50calshooter's build blew me away!
Talking with Jeff over at Vltor though, the only thing that needs to be fitted for the norgon ambi is that it is too long to fit in thier lower and still work with thier oversized mag release on the right side. He said it oversized button is roll-pinned to a modified version of a mag release. Other than carefully taking that apart and then shortening the norgon, it will all go back together and function as it should. See that's the part that blew me away by Vltor. I asked a simply question to them as a potential customer and they went way over and beyond to help me out. I have simply not experienced that in a loooooong time, and it made up my mind which platform to buy.
Now i just need to unload my Norc, so I can start to fund the Vltor!
Funny thing is, that it is the norc that started me looking at some king of ambi mag release. My norc came stock with a norgon copy/type ambi mag release for me. I noticed almost no others had it. This was all done by mear fluke, since I bought my first AR last year as a trial to get into the AR game. Was not sure I wanted in, but saw the norc as a good cheap platform to try. Well now I'm hooked. Also want to build a NEA platform for my son/daughter to play with as well. They are only 3 and 9 months, so I have some time to build it.
Thanks