Availability: In Stock
The Daniel Defense MK18 Upper Group is a short-barrel, combat-proven upper receiver assembly built for AR-15 platforms and purpose-built for close-quarters work. This 5.56x45mm NATO upper pairs a cold hammer-forged 10.3" government profile barrel with Daniel Defense's RIS II MK18 handguard—the same rail system fielded by USSOCOM—giving you a compact, modular shooter that doesn't sacrifice ergonomics or controllability. Whether you're setting up a short-range hunting upper, a home-defense AR, or a precision carbine for dynamic shooting, the MK18's reputation in professional and civilian circles speaks to its engineering and reliability.
The barrel is chrome-lined, mil-spec heavy phosphate coated, and stress-relieved via HP/MPI testing for durability in suppressed and unsuppressed fire. The upper receiver is CNC-machined from 7075-T6 aluminum with mil-spec indexing marks and M4 feed ramps. The gas system runs a pinned, low-profile carbine-length gas block machined from hardened 4140 steel, keeping the platform running soft and smooth. The included GRIP-N-RIP ambidextrous charging handle is engineered with anti-gas deflection features—critical if you plan to run a suppressor—and works equally well for left- and right-handed shooters. The complete assembly comes with an M16 profile bolt carrier group, properly staked and chrome-lined.
This is a no-frills, battle-tested platform. The RIS II handguard uses 6061-T6 aluminum construction with hard-coat anodizing and ships with heat-resistant Santoprene rail panels rated to 300°F. The Daniel Defense flash suppressor is stainless steel with salt bath nitride finish, keeping weight down and corrosion resistance high. Made in the USA, this upper is designed to be paired with a lower receiver of your choice—sights and optics are sold separately. As always, it's your responsibility to verify compliance with all NFA regulations and applicable federal and state law before assembly.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 10.3" |
| Barrel Profile | Government |
| Barrel Twist | 1:7 |
| Barrel Material | Chrome Moly Vanadium Steel, Cold Hammer Forged, Chrome Lined, Mil-Spec Heavy Phosphate Coated, HP/MPI Tested |
| Upper Receiver | Mil-Spec, CNC Machined 7075-T6 Aluminum, Type III Hard Coat Anodized, with Indexing Marks and M4 Feed Ramps |
| Handguard | Daniel Defense RIS II MK18, 6061-T6 Aluminum, Type III Hard Coat Anodized, Flat Dark Earth |
| Gas System | Carbine Length, Direct Impingement, Pinned Low Profile Gas Block (4140 Hardened Steel, Mil-Spec Heavy Phosphate Coated) |
| Charging Handle | GRIP-N-RIP Ambidextrous, CNC Machined Aluminum (7076-T6 Body, 6061-T6 Handles & Latch), Heavy Duty Stainless Steel Roll Pins |
| Bolt Carrier Group | M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key |
| Muzzle Device | Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished |
| Rail Panels | Santoprene, Heat Resistant to 300°F |
| Country of Origin | USA |
The Daniel Defense MK18 Upper Group is a complete upper assembly designed to pair with any mil-spec AR-15 lower receiver. You'll need to source a lower separately and assemble the two to create a complete rifle or SBR, depending on your configuration and local regulations.
Yes. The GRIP-N-RIP charging handle is specifically engineered with anti-gas deflection features that redirect gas upward and away from your face, making it well-suited for suppressed fire. The carbine-length gas system and proven platform also handle suppressed operation smoothly.
No. Sights and optics are sold separately. The upper arrives ready to be mounted to a lower receiver and can accept standard Picatinny rail-mounted optics and iron sights.
The MK18 is optimized for short-range, close-quarters applications with its 10.3" barrel and proven RIS II handguard. The shorter barrel length makes it ideal for CQB, home defense, and compact carry while maintaining the reliability and accuracy Daniel Defense is known for. Other uppers in the line may feature longer barrels or different rail systems suited to longer-range or specialized roles.
SKU: 126797957 • Width: 5.5in • Height: 4in • Depth: 28in • Weight: 3.85oz
Availability: In Stock
The Daniel Defense MK18 Upper Group is a short-barrel, combat-proven upper receiver assembly built for AR-15 platforms and purpose-built for close-quarters work. This 5.56x45mm NATO upper pairs a cold hammer-forged 10.3" government profile barrel with Daniel Defense's RIS II MK18 handguard—the same rail system fielded by USSOCOM—giving you a compact, modular shooter that doesn't sacrifice ergonomics or controllability. Whether you're setting up a short-range hunting upper, a home-defense AR, or a precision carbine for dynamic shooting, the MK18's reputation in professional and civilian circles speaks to its engineering and reliability.
The barrel is chrome-lined, mil-spec heavy phosphate coated, and stress-relieved via HP/MPI testing for durability in suppressed and unsuppressed fire. The upper receiver is CNC-machined from 7075-T6 aluminum with mil-spec indexing marks and M4 feed ramps. The gas system runs a pinned, low-profile carbine-length gas block machined from hardened 4140 steel, keeping the platform running soft and smooth. The included GRIP-N-RIP ambidextrous charging handle is engineered with anti-gas deflection features—critical if you plan to run a suppressor—and works equally well for left- and right-handed shooters. The complete assembly comes with an M16 profile bolt carrier group, properly staked and chrome-lined.
This is a no-frills, battle-tested platform. The RIS II handguard uses 6061-T6 aluminum construction with hard-coat anodizing and ships with heat-resistant Santoprene rail panels rated to 300°F. The Daniel Defense flash suppressor is stainless steel with salt bath nitride finish, keeping weight down and corrosion resistance high. Made in the USA, this upper is designed to be paired with a lower receiver of your choice—sights and optics are sold separately. As always, it's your responsibility to verify compliance with all NFA regulations and applicable federal and state law before assembly.
| Caliber | 5.56x45mm NATO |
| Barrel Length | 10.3" |
| Barrel Profile | Government |
| Barrel Twist | 1:7 |
| Barrel Material | Chrome Moly Vanadium Steel, Cold Hammer Forged, Chrome Lined, Mil-Spec Heavy Phosphate Coated, HP/MPI Tested |
| Upper Receiver | Mil-Spec, CNC Machined 7075-T6 Aluminum, Type III Hard Coat Anodized, with Indexing Marks and M4 Feed Ramps |
| Handguard | Daniel Defense RIS II MK18, 6061-T6 Aluminum, Type III Hard Coat Anodized, Flat Dark Earth |
| Gas System | Carbine Length, Direct Impingement, Pinned Low Profile Gas Block (4140 Hardened Steel, Mil-Spec Heavy Phosphate Coated) |
| Charging Handle | GRIP-N-RIP Ambidextrous, CNC Machined Aluminum (7076-T6 Body, 6061-T6 Handles & Latch), Heavy Duty Stainless Steel Roll Pins |
| Bolt Carrier Group | M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key |
| Muzzle Device | Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished |
| Rail Panels | Santoprene, Heat Resistant to 300°F |
| Country of Origin | USA |
The Daniel Defense MK18 Upper Group is a complete upper assembly designed to pair with any mil-spec AR-15 lower receiver. You'll need to source a lower separately and assemble the two to create a complete rifle or SBR, depending on your configuration and local regulations.
Yes. The GRIP-N-RIP charging handle is specifically engineered with anti-gas deflection features that redirect gas upward and away from your face, making it well-suited for suppressed fire. The carbine-length gas system and proven platform also handle suppressed operation smoothly.
No. Sights and optics are sold separately. The upper arrives ready to be mounted to a lower receiver and can accept standard Picatinny rail-mounted optics and iron sights.
The MK18 is optimized for short-range, close-quarters applications with its 10.3" barrel and proven RIS II handguard. The shorter barrel length makes it ideal for CQB, home defense, and compact carry while maintaining the reliability and accuracy Daniel Defense is known for. Other uppers in the line may feature longer barrels or different rail systems suited to longer-range or specialized roles.
SKU: 126797957 • Width: 5.5in • Height: 4in • Depth: 28in • Weight: 3.85oz