Cleaning out the parts bin.
#1 is a Frankford Arsenal AR-15 lower with a tight magazine well that you can't use P-mags in. In my lack of infinite wisdom I thought I'd mill down the tight spots with a dremel. A dremel does nothing to anodized aluminum other than make bad smells and remove the anodizing. So what I have now is a still functional though ugly AR lower. Everything else about it is fine, it's just the mag well is too tight for P-mags. Any aluminum mag or even the Lancer plastic mags will work fine, just no P-mags. $40.
#2 is a Cavalry Arms lightweight fixed rear sight. Not much to say, it's really lightweight. $20
#3,4 are fixed A2 length buttstocks. Includes the A2 length spacer. Believe these both are DPMS brand, but I can't remember and they aren't labelled. Both have trap doors. Does not include buffer tube or buffer, just the stock, spacer, trap door buttplate, and two screws. $30 each.