I am looking to buy this preowned Brownell's DD M4A1 upper and it has "DD PMP 5.56 NATO 1/7" on the barrel, I wanted to confirm this was the real thing. I searched around and could not find anything. Does anyone know?
It probably doesn't say "PMP" but rather F MP. Sometimes it's hard to see, but if you can rub a little bit of oil on the roll mark it makes it a bit easier.
Joe Marler
Daniel Defense
Law Enforcement Sales Manager