I have an alpha 1 that I've got to reseal the upper on. The only problem is some of the tabs on the retainer nut broke as I was trying to loosen it. I've never had one of these break before and didn't think they would so easily but this one kinda just fell apart. I'll try and upload picks. My question is if anyone knows of any tricks that could help me get it out that would be great. The only thing I can think up is cutting it with a dremel in 4 spots and hammering and picking it out.