Diamondback DB-15 CCML300BB .300 AAC Blackout AR-15 with 16 in Nitrided Threaded Barrel, Burnt Bronze Cerakote, Free-Float M-LOK
This Diamondback DB-15 CCML300BB stands out with a forged 7075-T6 aluminum receiver finished in burnt bronze Cerakote over Type III hard-coat anodizing, a 16 in nitrided CrMoV barrel threaded 5/8-24 with an A2 flash hider, and a free-float M-LOK handguard. It is chambered in .300 AAC Blackout, features an A3 flat-top Picatinny receiver that is optics-ready, and includes one 30-round Magpul PMAG. U.S.-made, it combines a clean, modern feature set with distinctive two-tone styling and practical details like a low-profile gas block and laser-engraved ejection-port cover markings.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in solid shape. There are scratches and blemishes present. The bore is clean and shiny.
What’s Included
- Diamondback DB-15 CCML300BB rifle (.300 AAC Blackout)
- 1x 30-round Magpul PMAG GEN M2 MOE polymer magazine (marked 5.56x45)
The 16 in barrel is made from 4140/4150 CrMoV steel, treated with a nitride finish, and threaded 5/8-24 for muzzle devices. A 1:8 RH twist supports a wide range of .300 Blackout bullet weights, and a low-profile gas block sits beneath the free-float handguard. The action uses a direct-impingement system with a rotating bolt.
Forged 7075-T6 receivers wear a burnt bronze Cerakote over hard-coat anodize, creating a durable, distinctive finish. The A3 flat-top Picatinny receiver is optics-ready and includes a forward assist. The dust cover is laser-engraved with “300” and “AAC” for easy chamber identification.
The free-float aluminum M-LOK handguard provides accessory mounting with top rail segments. Furniture includes a black polymer, 6-position collapsible stock with sling attachment slots and a Magpul MOE polymer pistol grip. A two-position safety selector is standard, and no sights are included from the factory.
Capacity is 30+1 using STANAG-compatible magazines. Overall length is approximately 32.7–36 in, and weight is approximately 6.6–6.7 lb. Country of origin is the United States, and the MSRP is listed at $788.