Diamondback DB15 .300 AAC Blackout AR-15 Rifle, 16-inch Threaded Barrel, Green Cerakote, Free-Float M-LOK, 30+1
This Diamondback DB15 stands out as a .300 AAC Blackout AR-15 with a 16-inch threaded barrel, a long free-float M-LOK handguard, and a distinctive green Cerakote finish across the receivers and handguard. It is marked clearly for 300 AAC on the ejection-port cover and 300 BLACKOUT 1/8 on the barrel, and it includes a 30-round PMAG specifically marked for 300 BLK. Built in Cocoa, Florida, this rifle pairs proven AR-15 features with caliber-specific details that are easy to verify.
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.
Specific Condition Notes: Surfaces show minimal marks from prior handling and use. Please refer to the photos for a complete view of the rifle.
What’s Included
- Diamondback DB15 rifle chambered in .300 AAC Blackout
- 1x 30-round Magpul PMAG marked for 300 BLK / 7.62x35
- Skeletonized angled foregrip (M-LOK, installed)
Chambered in .300 AAC Blackout (7.62x35mm), this DB15 uses a 16-inch barrel with a 1:8 twist, factory rollmarked "300 BLACKOUT 1/8." The barrel is threaded and fitted with an A2-style flash hider, providing a standard interface for compatible muzzle devices. The ejection-port cover is marked "300 AAC" for instant caliber identification at a glance.
The rifle operates on a semi-automatic, direct impingement gas system and is built on the AR-15 platform. It features an aluminum upper with a forward assist, shell deflector, and ejection-port cover. A long, free-float M-LOK aluminum handguard offers accessory mounting versatility, with a short Picatinny rail segment at the 12 o'clock position near the front.
Ergonomics are set up with an adjustable black polymer stock and a Magpul MOE pistol grip. Length of pull is 13.5 inches, and the manual safety selector provides familiar AR controls. Capacity is 30+1, and the included PMAG is specifically marked for 300 BLK / 7.62x35 to match the chambering.
Receivers and handguard wear a green-tone Cerakote finish that is both durable and visually distinctive. Branding and identifiers include the DB shield logo on the magwell, a lower marked "CAL. MULTI" over "DB15," and caliber-specific markings on the barrel and ejection-port cover. The rifle is manufactured in the USA, in Cocoa, Florida.
This example includes a skeletonized angled foregrip installed on the M-LOK handguard, complementing the rifle's control and handling. With caliber-specific markings, a threaded barrel, and a cohesive green Cerakote finish, it presents a clear, well-configured .300 BLK setup.