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

Details

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.

Specifications

Caliber: .308 Win

Barrel Name: "Scrubber" LR-308 .308 Win 18" Contour 1:10T 4150 CMV Mid Gas Barrel

Barrel Length: 18 inches

Barrel Material: 4150 Chrome Moly Vanadium

Barrel Twist Rate: 1:10

Barrel Profile: Contour

Barrel Finish: Manganese Phosphate

Barrel Thread Pitch: 5/8×24

Barrel Gas System Length: Rifle

Gas Block Size: 0.75

Handguard Name: ‘Friz’ 15" M-LOK LR-308 Low-Profile Handguard

Handguard Length: 15 inches

Handguard Material: 6061-T6 Aluminum

Handguard Color: Black

Handguard Style: M-LOK

Upper Receiver Name: DPMS Style LR-308 Low Profile Upper Receiver, Forward Assist Compatible

Upper Receiver Material: 7075-T6 Aluminum

Upper Receiver Finish: Anodized Black

Muzzle Device: AR-15/AR-10 .308 5/8×24 TPI GI Birdcage Flash Hider

Muzzle Thread Pitch: 5/8×24

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