'07 Springfield-Style Sling Use

I'd posted one link on how to use the '07 sling before, but I came across an article by Walt Kuleck, who co-wrote the assembly guide for the AR-15 that I have.  I found the vintage instruction manual pictures used to be more illustrative than the pictures in the previous link.

Magazine Storage

Need a place to put your explosives?  Check out U.S. Explosive Storage!  Funky that they fabricate such containers, but somebody's gotta do it, eh?

Other Lowers

Found a couple AR-15 lowers of interest.  Still can't find any made out of steel, except the 80% ones that you have to finish yourself, or the $1k Spider Firearms one.

Aero Precision (I think they make the AR-57 as well)
Stubborn Mule Outdoor Supply (slick looking single-shot lower, except I prefer the standard trigger guard)