Diamondback (DB) AR-10 Upper (DPMS Pattern) — 20" 6.5 Creedmoor, FDE
This Diamondback AR-10 upper assembly is chambered in 6.5 Creedmoor and built around a 20" fluted 416 stainless steel barrel with a 1:8 twist rate. It uses a direct-impingement gas system with a rifle-length gas tube and a low-profile gas block. Barrel is marked "6.5 CREEDMOOR 1/8"; ejection-port cover is marked ".308 WIN" (marking appears to be on the dust cover, not the barrel).
Configured with a 15" M-LOK anti-rotation S-rail handguard (full-length top Picatinny) and an A2-style flash hider (birdcage style). Includes bolt carrier group (BCG) and charging handle.