Fully ambidextrous, 45/90 degree selector compatible, it is without a doubt one of the finest receivers available 
Thank you Pieter for the excellent video, the 45/90 selector is mentioned around 5:58 
i cant and wont use any other lower
AXTS is a young company that has done a lot of work to bring their receivers to market, I hope folks here and elsewhere will support them in their endeavor, as we and many others in the industry have and will continue to do
I think my next SBR is going to be a build just because that means I can use my favorite components from accross the board. I don’t think two parts will have come from the same manufacturer if I end up doing the build the way I want. :lol: The AX556 will definitely be the lower that I use however.
I’ve got one for my 45 degree selector and I love it. Great idea as I don’t like a BAD lever hanging off my rifle.