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The MK18 RIII™ AR15 style Upper Receiver Group is unmatched in size, weight, and performance, and is built around a 10.3 inch Cold Hammer Forged M4 Profile barrel with a Daniel Defense Flash Suppressor, a GRIP-N-RIP Charging Handle, and our carbine length gas system. It features a 9.5 inch lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM— which features M-LOK attachment for lighter weight. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.
NFA DISCLAIMER
Once this part is assembled into a complete firearm, it becomes a regulated item by the National Firearms Act (NFA). Please check with your local and state municipalities for any further regulatory requirements. It is the buyer's responsibility to make sure they comply with all NFA rules and applicable laws.
MATERIALS & CONSTRUCTION
- UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
- BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 10.3" Government Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
- GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel with Mil-Spec Heavy Phosphate Coating, Carbine Length, Direct Impingement
- MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
- BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
- SIGHTS: Sold Separately
- HANDGUARD: Daniel Defense RIS III 9.5, Patented, 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum
- CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7076-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized
- Made in the USA!
Specifications
| Mounting System | M-LOK |
|---|---|
| Caliber | 5.56mm NATO |
| Material | Chrome Moly Vanadium |
| Manuf. Process | Cold Hammer Forged |
| Twist Rate | 1:7 |
| Gas System | Carbine |
| Barrel Length | 10.3" |
| Barrel Profile | Government |
| Product Weight | 3.5 lbs |
| Manufacturer | Daniel Defense |
