The original was a Ciener unit. They worked and worked well, but there was never any spare parts for them. As they wore some, they needed tweaking. There are precious few gun guys in America that will even touch them now, since they're so unique and carry a HUGE $$$$$ tag when they are for sale.
The Shrike has been vapor ware for years, until 2003(I think), when a total of 3 units were produced. ARES took deposits ($2500-$5000, depending on when you got in on the deal) and has continued to set delivery dates back...not days, not weeks, not months, but years! I had a deposit on one, but after a two year wait and the second worst customer service in the gun business (they sometimes even answered their phone) (COLT is the worst, when you actually get to talk to a human), I got my money back (but not without threatening LEGAL action through my lawyer, in spite of the "NO BS refund on a deposit" clause in their contract, which has also changed 3 times over the life of this "product development"). Oh, and the price keeps going up, too!
Reportedly, the 3 delivered units actually worked. None have been seen since, and the 3 do not pop up at the large gun shoots anymore, at least not that I've heard or seen reported.
There was even some controversy that they would be made Class 3, since the feed device was in the reciever, even though it was just an upper. ARES and the BATF
NEVER defenitively clarified this to most people's satisfaction, which is another reason that I pulled out.
Reports surfaced last year that one of the three available uppers went on one of the gun auction sites for in excess of $10K. Don't know if that's true or not.
Sorry to rain on your parade. I want one, too, and I actually put my money where my mouth is (was) and ponied up for a deposit. I took the deposit when I got it back and went full M16 with a registered reciever. Great investment, great fun, about the same price in the end, and readily available!
Tom