I'm also interested in a Dissipator upper, so long as it's done correctly. From what's available currently, that appears to be CMMG. Their mid-length gassed Dissy runs about $625. Does anyone know if this can be bought from CMMG without the BCG/charging handle and, if so, what's the price difference? Also, does anyone have a clue as to when BCM may be offering a Dissipator? I wonder what their price point will be, and what barrel contour they'll use for this platform. I've been pleased with my experiences with BCM, so I'd trust them to get a Dissy done right.