ASK AN EXPERTDescription
- 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
- 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
The DANIEL DEFENSE MK18 RIII 5.56mm NATO Upper Receiver Assembly is unmatched in size, weight, and performance, and features the Daniel Defense RIS III rail. The lightweight RIS III rail - modeled after the revolutionary RIS II two-piece handguard developed for SOCOM - features M-LOK attachment for lighter weight.
The 10.3 inch Cold Hammer Forged barrel is the same length in use for the MK18 upper most commonly used for CQB operations. Its independently ambi GRIP-N-RIP Charging Handle accommodates left- and right-handed shooters. All Daniel Defense complete upper receiver groups come standard with an M16 profile bolt carrier group.
Warranty Information
| Caliber | 5.56x45mm NATO |
| Material | Aluminum |
| Color | Black |
| Finish | Anodized |
| Barrel Length, in | 10.3" |
| Barrel Material | 4150 Chrome Moly Vanadium Steel |
| Barrel Finish | Black Phosphate |
| Twist | 1:7" |
| Threads | 1/2"-28 |
| Barrel Contour | Government |
| Chrome Lined | Yes |
| Gas Block Diameter, in | 0.75" |
| Gas System Length | Carbine |
| M4 Feed Ramps | Yes |
| Upper Receiver Type | A3 Flat-Top |
| Handguard | FDE 9.5" lightweight RIS III |
| Bolt Carrier Assembly Included | Yes |
| Muzzle Device | Flash Suppressor |
| Compatible With | AR-15 |
| Mil-Spec or Commercial | Mil-Spec |
