Daniel Defense DD5 V3 7.62x51 12.5" Bbl M-LOK Complete Upper Receiver Group * UPPER RECEIVER: CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized * BARREL: DD Proprietary Steel, Cold Hammer Forged, 1:10" Twist, 12.5 S2W Profile, Mid-length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated * GAS SYSTEM: User-Adjustable Gas Block CNC Machined of 4140 Hardened Steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement * MUZZLE DEVICE: Daniel Defense Linear Compensator, 17-4 PH Stainless Steel, Salt Bath Nitride Finished * HANDGUARD: Daniel Defense DD5 Rail 10.5, CNC Machined of 6061-T6 Aluminum, M-LOK Attachment, Type III Hard Coat Anodized * HANDSTOP: Daniel Defense M-LOK Handstop, Anodized Aluminum * User-adjustable gas block for reliable suppressed shooting * Superfinished and DLC-coated bolt carrier group makes it easy to clean and operate in all conditions * Bolt carrier is equipped with a buffer for optimized cycling and improved recoil impulse * Bolt is designed with enhanced extractor geometry and dual ejectors for reliable cycling * 12.5" Cold Hammer Forged proprietary steel chrome-lined barrel for a lifetime of accuracy and durability * Innovative 4-Bolt Connection System to ensure greater accuracy * GRIP-N-RIP independently ambi charging handle with anti-gas features for a better shooting experience