Diamondback DB15 5.56mm NATO AR-15 Rifle – 16″ Nitride Barrel, 15″ M-LOK Handguard, Collapsible Stock
The Diamondback DB15 combines a full-length 15-inch free-float M-LOK handguard with a 16-inch black-nitride barrel, delivering reliable 5.56mm NATO performance in a lightweight, mid-6-pound package. Fully manufactured in the USA from 7075-T6 aluminum and 4150/4140 chrome-moly steel, this direct-impingement rifle offers a multi-caliber lower, mid-length gas system, and modern furniture—all at an approachable price.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Very light external scuffing is present, but it does not affect function or appearance in any meaningful way. The bore remains bright and well-defined, reflecting minimal use.
What’s Included
- (2) 30-round aluminum USGI-pattern AR-15 magazines with orange anti-tilt followers
Factory-installed 15-inch free-float M-LOK handguard maximizes accessory space while removing pressure from the barrel for improved accuracy potential. Decorative 5.56 NATO callouts on the dust cover provide quick chamber confirmation without permanent receiver engraving.
The 16-inch barrel handles a broad range of projectile weights (55–77 grains), giving the shooter flexibility from training loads to heavier match-grade rounds. Mid-length gas placement softens recoil impulse and reduces component wear compared with shorter carbine systems.
Diamondback machines both upper and lower receivers from 7075-T6 aluminum and finishes them with a durable matte black hard-coat anodizing. A standard mil-spec trigger, magazine release, and charging handle ensure straightforward parts compatibility and easy serviceability.
The collapsible six-position stock with friction-lock lever lets shooters tailor length of pull, while the Magpul MOE grip offers an ergonomic, non-slip interface. A2 flash hider, 1/2 × 28 muzzle threads, and a “CAL. MULTI” marked lower keep future caliber conversions simple.