Diamondback DB15 5.56mm NATO AR-15, 16 in Barrel, 1:7 Twist, FAB Defense GL-CORE Stock, Magpul MOE-K2+ Grip, A2 Front Sight
This Diamondback DB15 is a 5.56mm NATO, AR-15 platform rifle with thoughtful upgrades and clean condition. It features a 16-inch threaded barrel with an A2 flash suppressor, a forged 7075-T6 aluminum receiver set, and an A3 flat-top upper. Notable enhancements include a tan FAB Defense GL-CORE collapsible stock and a Magpul MOE-K2+ pistol grip. It comes with iron sights, including a fixed A2 front sight base and a polymer flip-up rear sight, plus a Magpul PMAG Gen M3 magazine.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minimal markings from previous handling and use. Please refer to the photos for a closer look.
What’s Included
- Diamondback DB15 5.56mm NATO rifle
- 1x Magpul PMAG Gen M3 30-round 5.56x45 polymer magazine
- Polymer flip-up rear sight (installed)
- FAB Defense GL-CORE collapsible stock, tan (installed)
- Magpul MOE-K2+ pistol grip (installed)
The rifle is built on forged 7075-T6 aluminum receivers with a hardcoat anodized black finish. The A3 flat-top upper includes a forward assist, shell deflector, and ejection-port cover. The lower is multi-caliber marked, and the rifle uses a standard curved trigger and standard magazine release. Capacity is 30+1.
The 16-inch barrel is threaded and fitted with an A2 flash suppressor. A 1:7 twist rate supports a wide range of 5.56mm NATO projectile weights for dependable stabilization. The bore condition is excellent, with sharp rifling.
Furniture includes a tan FAB Defense GL-CORE collapsible stock and a Magpul MOE-K2+ pistol grip for a secure, hand-filling hold. Length of pull is 13.25 inches. The carbine-length, two-piece ribbed polymer handguard is retained by a delta ring with a round handguard cap.
Sighting is handled by a fixed A2 front sight base with a bayonet lug and sling swivel, paired with a polymer flip-up rear sight. This iron-sight setup is practical and durable.
Operation is semi-automatic with a direct impingement system and a manual safety. Made in the USA, this DB15 ships with a Magpul PMAG Gen M3 30-round magazine.




