I had read online that the probelm with the Ciener Ultimate over/under was that the recoil of the 12 gauge would start the inlarge the front takedown pin holes of M16 lower receiver. 8 years ago I called up the company trying to purchase this mounting system, but they said they no longer produced them. I also wanted to do that belt feed AR-15 conversion, but they stopped doing that too. I ended up purchasing a Knight Armament Masterkey to get over this itch I had, from seeing the movie Predator when I was a kid.
Last edited by waiting4something; 07-11-2011 at 04:08 PM.
Reason: bad spelling
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