View Full Version : .556 BCM Barrel Markings ?

Metal Magic
02-29-2012, 7:40 AM
Hey guys (and gals), just received a BCM 16" carbine upper and I noticed that the barrel markings state: MP .556 1/7. I wonder if these barrels are still High Pressure Tested? I know on the web site it says all "BCM barrels" are HPT but on my Middy it is clearly labeled on the barrel. Any ideas?

02-29-2012, 8:28 AM
Both of my barrels read: HP MP 1/7 5.56 NATO

However, manufacturers have been known to change their stamp from time to time.

Where did you get the barrel from?

Metal Magic
02-29-2012, 9:47 AM
Bravo, it was a complete upper actually. I just got a response from an E-mail I sent comfirming that all their barrels are HPT so I guess my question has been answered

02-29-2012, 2:01 PM
Does it indeed say .556, or 5.56?

Metal Magic
02-29-2012, 5:00 PM
Sorry I was in a hurry to get to work today and I have been battling a gnarly cold,

5.56 lol

anyways upon closer inspection the Barrel is labeled HP MP 5.56 1/7 NATO I don't know what I was thinking ! stress has been accumulating due to school, work, a cold, and some family issues. I feel like a dummy but hey, at least my barrel is HP tested :facepalm: