New guy, checking in. I'm looking to get into the 7.62 NATO AR game, with the end goal of a Franken-308 with 20" to 22" chrome-lined or stainless barrel, piston system, and able to take KAC/DPMS/Magpul pattern magazines. I like the side-charging Fulton Armor upper and the prototype ADC piston system, and will like for a way to marry them with a Stainless or Chrome-lined pipe with 20 to 22" length. 5R would be nice, but not a deal-breaker. My desired result is something similar to a Fulton Armory Titan M110... with a grafted in ADC piston. Link is here... http://m4carbine.net/showthread.php?t=49555 Expect plenty of annoying questions. Best, JBR