Hi Folks, I made an impulse buy yesterday at PUY gun show. Had a 10AM meeting so my time to shop was limited. Bought a BCM upper with iron front site, no hand guard and these markings on the barrel, please translate: "HP MP 1/7"( I get that's barrel twist) and I get NATO 5.56. SOOOOO, I was in a hurry and the big seller's people were pretty busy so I didn't have time to ask a lot of questions. No label on the upper,or in the plastic sleeve it was in. etc. Can somebody familiar with BCM translate exactly what I got? With suppressor barrel is 16 inches. I paid less than 600 so I think it was worth it. It was there and I needed an upper/barrel for my AR build. Saving money now for a good bolt. I've checked photos on the BCM site but see none without hand guards. i THINK its mid piston. Also I am pleased with the twist and the finish. With my Aero lower progress continues on amassing parts for my Guinness World record longest AR build ever? Thanks for any info. Prices overall looked like they had dropped some but still lots of of folks wanting big money for ARs. Crowd was well over 100 people 15 minutes before doors open. Brutus Out!