The DB15 series caters to a diverse range of shooters with its extensive selection of caliber choices. Ranging from 5.56 to 6.5 Grendel, you're certain to find a model suited to your specific use. All DB15 series variants utilize the reliable U.S. Military-proven gas-impingement system and critical components like the barrel, upper receiver, lower receiver and handguard are precision-machined in-house using our advanced Diamondback CNC machines. Within the DB15 series, you'll find various finishes and lengths, often accompanied by Magpul furniture as standard. With our three-tiered approach (carbon series, black gold series, Diamond series), we ensure there's an appropriate choice for every firearm enthusiast, from entry-level models for first-time buyers to precision options for competition shooters.