Davidson Defense ECHO-XVIII 18-inch LR-308 .308 Win Rifle Upper Build Kit

The ECHO-XVIII 18-inch LR-308 .308 Win Rifle Upper Build Kit from Davidson Defense is built for marksmen who demand long-range authority with battle-ready ruggedness. At its heart is the 18-inch “Scrubber” barrel—crafted from 4150 Chrome Moly Vanadium, finished in classic manganese phosphate, and spun with a 1:10 twist rate for supreme ballistic stability. A rifle-length gas system and 0.75 gas block size keep the cycling smooth and reliable, shot after shot.

Anchoring this beast is a DPMS-style LR-308 low-profile upper receiver forged from 7075-T6 aluminum and finished in sleek anodized black for both resilience and attitude. Wrapped around it all is the 15-inch ‘Friz’ M-LOK handguard, made from lightweight yet tough 6061-T6 aluminum—ready for any mission-essential accessory you want to throw on. To top it off, the classic AR-10 .308 birdcage flash hider caps the build with a functional, no-nonsense finish. The ECHO-XVIII doesn’t just deliver—it dominates.