The Diamondback DB15 CCML is a variant of the Diamondback DB15 series of AR-15-style rifles. The CCML stands for “CNC Carbon Magpul M-LOK,” indicating some specific features and components. However, please note that my knowledge cutoff is in September 2021, and there may have been updates or variations to the DB15 CCML model since then. Here is some general information about the Diamondback DB15 series:

1. Caliber: The DB15 series is typically chambered in .223 Remington/5.56x45mm NATO. Some models may also be available in other calibers such as .300 AAC Blackout.
2. Construction: The DB15 rifles feature a direct impingement gas system and are built on a forged 7075 T6 aluminum receiver, which provides strength and durability. The CCML variant specifically incorporates CNC machining and carbon fiber components.
3. Barrel Length: The barrel length of the DB15 rifles can vary, but common lengths include 16 inches, which is the standard length for civilian models, as well as shorter or longer options for different purposes.
4. Handguard: The CCML variant features a Magpul M-LOK handguard made of carbon fiber. The M-LOK system allows for the attachment of various accessories, such as grips, lights, and rail segments, using M-LOK-compatible mounting slots.
5. Sights: The DB15 series often comes without iron sights, allowing users to customize their optics or add their preferred sights.
6. Magazine Compatibility: The DB15 rifles typically accept standard AR-15 magazines, including both aluminum and polymer variants.
7. Other Features: The DB15 series may include other features like a free-floating barrel, a forward assist, an adjustable stock, a dust cover, and a flash suppressor.

It’s important to note that specific features and specifications of the Diamondback DB15 CCML can vary, and it’s always best to refer to the manufacturer’s website or contact a reputable firearm dealer for the most up-to-date and accurate information about a particular model.