The guys at ar15.com are posting their own WECSOG tips as well as money savers. For example, a #7 O-ring from Lowe’s that goes for about $0.10 can be substituted for an Accu-Wedge (cost $5) to eliminate upper/lower receiver rattle. Good stuff for you DIYers and cheapskates.
Wow thats an old thread but alot of good info there. I have it bookmarked somewhere.