
I think you guys purposefully confused "Top Drawer" with "high shelf!"
I assumed they were Top Drawer! Was interested in the structure of the well cut behind the selector/safety shaft. I find it curious that such makers as Stag and LMT make high shelf uppers. I understand that Colt is trying to be PC ... but why others? And yes, the question was related to the use of an auto sear.
Is not critical for me now, but if the 1986 restriction on new weapons into the pool is ever relaxed I'd very likely do a transfer and an auto sear makes more sense than an RR or a lightning link. So, for the moment is just idle curiosity. Will just have to be happy with an RR M16

Thanks!