Did you get this from Dlask?
I got this one from Leigh:
I just happened to have a correct bayonet for it. Perfect fit.
I asked Leigh for suggestions on what to do with my Dlask 'Justin Case' lower, and he said "M16"?
I had wanted one of these since I was a kid, but had complelty forgotten, or never thought it would be possible.
He had a Colt upper sitting there, and so I said YES PLEASE!
Leigh went to work, and sourced all the parts needed to build an authentic M16. It's as close as I'll ever get anyways. Within a week, it was done. I can't get over how light it is. It really shoulders well.
I've ordered a correct VN era sling, and working on finding a Brownells repro waffle mag to complete it.
Leigh has a few more uppers hanging around, and now that he's built this one, it will be much less work to build more. Why don't you contact them, if you're interested?