Daniel Defense Rifle DDM4 with accompanying Surefire SOCOM 556-RC3 Sound Suppressor, Surefire Fast-Attach WARDEN, and Surefire SOCOM Muzzle Brake for 5.56mm Quantity: 10 Action: Gas impingement Semi-Automatic Caliber: 5.56 MM NATO Barrel: 11.5" in length Twist rate of 1:7 Barrel must be threaded 1/2 by 28 Low profile gas and barrel systems with no fixed front sight post Made of Chrome Moly Vanadium Steel Cold Hammer Forged Chrome Lined MP tested Mil-Spec Heavy Phosphate Coated Muzzle Device: Device capable of flash suppression and compensation 17-4 PH stainless steel, salt bath nitride finished Upper Receiver: Flat top with nothing attached to the 1913 Picatinny rail Rail flush with rail attached to hand guard CNC machined 7075-T6 Aluminum to mil spec standards Mil-Spec with indexing Marks and M4 Feed Ramp Type III Hard Coat Anodized Gas System: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate or SBN Coating Carbine length Gas System Direct Gas Impingement Hand guard: Constructed of aluminum with an integrated top 1913 Picatinny rail CNC Machined of 6061-T6 Aluminum Type III Hard Coat Anodized Minimum of a 10.0" hand guard Santoprene Hand guard Rail Panels, heat resistant to 300 degrees Fahrenheit Bolt Carrier Group: M16 Profile Mil-Spec Tested Chrome Lined Properly Staked Gas Key M16 Style Firing Pin Receiver Extension: Six (6) position Mil-Spec 7075-T6 Aluminum Lower: Matched set to the upper CNC machined from 7075-T6 Aluminum Enhanced Flared Magazine Well and Rear QD Swivel Attachment Point Type III Hard Coat Anodized Geissele Automatics Super Charging Handle 5.56 Military specification safety lever Stock: Integrated attachment point, which allows for attachment of a quick detach sling swivel Glass Filled Polymer with Soft Touch Over-molding Trigger: Geissele Automatics SAA Trigger NSYS Trigger pull weight: 1st Stage 2.5lbs and 2nd Stage 2.0lbs Match grade to ensure repeatable accuracy Buffer: H Buffer Accessories: Flip-up front (Match) and rear sight, steel construction, designed for mount on Mil-Std 1913 rail Law Tactical Folding Stock Adapter – Generation III or newer Daniel Defense Rifle DDM4 with accompanying Surefire SOCOM 556-RC3 Sound Suppressor, Surefire Fast-Attach WARDEN and Surefire SOCOM Muzzle Brake for 5.56 mm. SEE SPECIFICATION SHEET FOR ALL REQUIRED INFORMATION REGARDING THE RIFLES AND ACCESSORIES.