Thanks everybody.
Yep matt7184, I was thinking about the missing M&P revolver when I posted the photo, but I think it'll have wait for now.....maybe :wink:
YukonG, all I know about the barrel is what the S&W propaganda says, " 20 inch Stainless Matte Finish, Wylde Chamber, 8" Twist Barrel for Sub MOA with Quality Ammuntion"
I just picked up The M&P15pc Wed. night so I haven't had a chance to try it out yet. There will be a Range Report forthcoming after my scope mount comes in and I work up some loads with 77gr Sierra MatchKing HPBT bullets.