So, I've had this old Colt 5.56 barrel sitting in a drawer for quite a while. Nothing spectacular, just a 16" carbine, but it is a LW .625 pencil profile. I took it off a Colt 6520, and replaced it with a LW 14.5" middy.
I recently decided to start moving on my "pistol" build. Now instead of a new barrel, I found a guy who'll cut this Colt bbl down to size for me. I always hated that short barrels were med/hvy profiles. I'm going to take this old barrel down to 10.3" and bask in the excellence of its lightweight.
I've seen some pretty light pistol/SBR builds. I can't wait to see how this one turns out. I have an $1100 order on Brownells saved for a later date. I think the last part I'm waiting on is the release of the KAC URX4 rail system.