Help finding a thread.

I need help finding a thread that had a bunch of muzzle blast pictures. I don't remember the title and I've tried the search with no luck. One picture I remember in particular was an AR with the bolt open after ejecting a casing and there was fire and sparks coming back out of the chamber. I also remember there being quite a few muzzle blasts from NFA weapons as well.

Anybody remember which one I'm thinking of?

M60 was the photographer. Pretty cool stuff:

http://thehighroad.org/showthread.php?t=303616



Here's a follow up thread:
http://thehighroad.org/showthread.php?t=310953

That be it. I been lookin' for that for awhile. Thanks