I purchased this upper receiver just to check out the BCM hype without breaking the bank. It is advertised as having a tighter barrel extension fit, sometimes requiring heat to fit. With the barrel I had on hand, the fit was more snug but the barrel slipped in without trouble. The everything...
Never used. Lower receiver has a guard for protection against accidental presses when using an ambi-mag release and built-in QD points. Usually in the New Orleans or Metairie area. $200 OBO