Quoted from lllvjr:
This ones a little more special to me... My dad was a machinist for 40 years. The company he worked for opened a gun smith division a year ago. The very first ar15 the company built my dad milled the lower himself. He also got to pick the serial number they were submitting to the ATF. I asked for Bamf001... But settled for our personal initials and the year. Lllv2016... Like my pinside name... Here's pics when he finished the part and here's the complete gun he put together. The gun shops first ar15. Dad finished the gun 6 months ago, and retired at 64.
Nice, from the m4 style barrel I would say it's finished out in .223?