[will post pics of my AR once everything is here] So, I now have all my deliveries except my red-dot. What I need now is a one stop shop to get a good carbine stock wrench, single point sling adapter(my upper came w/a Troy single point sling, but I need an adaptor and wrench to make it work and I want a good one that will last past one use), cleaning stuff(chamber, carbon scraper..etc),mag loading tool, rail covers that fit a YHM ff rail...etc, I'm new to the AR-15 world and I know I can get each from diff places, but I'd really prefer to buy all this from one place(don't want to watch/wait for many deliveries if I can get it all in one shot. Plus, I have a question.....Included in my BCM bcg was a small black o-ring. My only previous experience w/this pattern rifle was in the Army and I don't remember anything about an o-ring, so what is it for and where does it go? edit-ps--anyone have a link to THT's site?