DMPS 16 inch Bull Barrel--Fire Lapped--approximately 200 rounds through it.
To which I've added:
1/2 inch scope riser
Free floating forearm
Harris swiveling Bipod with optional friction lock
Custom brass deflector
Extended cocking lever
Bausch and Lomb 6X24 Scope with adjustable objective lens & lens caps
Burris 1 inch scope rings
Bubble Level mounted on top of scope
I built this upper for a prairie dog hunt that didn't happen. With the right loads it will shoot 1/2 inch 5 shot groups. Every item is the best that money can buy. I would rate the complete top as 99%.