All the DD's components are made completely in house, nothing is out-sourced.I just saw a review of that DD 300B AR pistol.
That just may be my next purchase.
All the firearms are built on the same assembly line so nobody knows whose getting civilian, military or police to keep the QC at it's best.
There's a reason why they're so pricey, but they exude quality and craftsmanship.
I bought it over a Wilson Combat AR .300BO for around the same price, they're that nice!
I bleed Wilson, I have a Wilson/Colt that's my daily carry piece in 45acp, but Wilson does out-source some of their small parts.