Both of mine have Dtech built uppers.

The first is an OLY SUM in .223 w/20" fluted barrel, 1:8 twist, Rock River Lower w/ 2 stage NM trigger, Burris FFII 3-9x40 Ballistic Plex, and Armalight mount.

The other is a A4 Rock River in .223w/18" fluted 1:8 twist on a Stag lower with RR 2stage NM trigger, Armalight mount, and a Burris FFII 4.5-14x40 Ballistic Plex.

They work good on the hogs too.

"The recreational value of a head of game is inverse to the artificiality of its origin"

"No prize is greater than the effort taken to acheive it"

- Aldo Leopold, The Father of Wildlife Management