SOLD pending payment For sale: PSA 20" hammer forged, chrome lined upper receiver. A2 profile, this is the one with the machine gun steel and extra thick chrome. Also complete Failzero bolt and carrier group (nickel boron treated), BCM gunfighter charging handle (medium size) and Magpul backup sight. I put a few rounds through it to make sure headspacing and everything was good, looks just about unfired. Let me know if you don't want the A1 handguard, someone probably will.