Uppers
Moriarti AR-15 6.8 SPC II 10.5" Complete Upper Assembly | M-LOK | A2 Flash Hider | Suppressor Ready
Upgrade your AR-15 with the Moriarti Armaments 6.8 SPC II 10.5" Complete Upper Assembly, engineered for shooters who want the proven performance of 6.8 SPC II in a compact, maneuverable platform. Combining premium materials, precision machining, and Mil-Spec compatibility, this upper is equally at home on the range, in the field, or as the foundation of a custom AR build.
Built around a 10.5-inch 4150 Chrome Moly Vanadium barrel with a 1:10 twist, this upper is designed to provide dependable accuracy and reliable cycling. The lightweight 10-inch free-float M-LOK handguard, forged 7075-T6 upper receiver, and carbine-length gas system deliver durability, modularity, and outstanding performance.
The 5/8x24 threaded muzzle makes this upper suppressor ready, allowing compatibility with many muzzle devices and suppressor mounting systems. Designed around the 6.8 SPC II chamber, this upper uses a 6.8 SPC II / .224 Valkyrie compatible bolt, giving builders additional flexibility for future caliber-specific projects.
Manufactured in the USA, this upper delivers the quality and reliability expected from Moriarti Armaments.
Features
Barrel
- Caliber: 6.8 SPC II
- Barrel Length: 10.5"
- Material: 4150 Chrome Moly Vanadium
- Parkerized Finish
- Twist Rate: 1:10
- Government Profile
- Thread Pitch: 5/8x24
- Carbine-Length Gas System
Gas System
- Carbine-Length Gas System
- Steel Low-Profile Gas Block
- Tuned for dependable cycling
Upper Receiver
- Forged 7075-T6 Aluminum
- A3 Flat-Top Design
- Hardcoat Anodized
- Forward Assist Installed
- Dust Cover Installed
- M4 Feed Ramps
Handguard
- 10" Super Slim Free-Float M-LOK Handguard
- Aircraft-Grade Aluminum
- Lightweight Construction
- Full-Length Top Rail
- M-LOK Accessory Slots
- Free-Float Design for Improved Accuracy
Muzzle Device
- A2 Flash Hider
- Crush Washer Included
- Suppressor-Ready 5/8x24 Threads
Why Choose 6.8 SPC II?
The 6.8 SPC II was developed to provide increased downrange energy over traditional 5.56 NATO while maintaining compatibility with the AR-15 platform. It has become a popular choice among hunters and AR enthusiasts looking for a cartridge capable of launching larger-diameter bullets from a lightweight rifle.
The 10.5-inch configuration creates a compact AR platform that remains easy to maneuver while retaining the flexibility to accept a wide range of accessories and muzzle devices.
Perfect Pairings
Complete your build with:
- Moriarti 6.8 SPC II / .224 Valkyrie Bolt Carrier Group
- AR-15 Charging Handle
- AR-15 Lower Receiver
- Suppressor-Ready Muzzle Devices
- M-LOK Accessories
- Custom Builder Sets
Made in the USA
Manufactured in the USA using premium materials and Mil-Spec manufacturing standards for durability, reliability, and consistent performance.
Important Information
- Bolt Carrier Group not included.
- Charging Handle not included.
- Compatible with Mil-Spec AR-15 lower receivers.
- Requires a 6.8 SPC II / .224 Valkyrie compatible bolt.
- Product images may not exactly represent the final configuration.
Frequently Asked Questions
What is the 6.8 SPC II cartridge designed for?
The 6.8 SPC II was developed to deliver increased energy and larger projectile performance than traditional 5.56 NATO while maintaining compatibility with the AR-15 platform.
Is this a complete upper assembly?
Yes. This upper includes the assembled upper receiver, barrel, gas system, handguard, and A2 flash hider. The Bolt Carrier Group and Charging Handle are sold separately unless otherwise specified.
Is this upper suppressor ready?
Yes. The barrel features 5/8x24 muzzle threads, making it compatible with many suppressor mounting systems and muzzle devices.
What bolt does a 6.8 SPC II upper require?
This upper requires a 6.8 SPC II bolt, which shares the same bolt face as .224 Valkyrie. A standard 5.56 NATO bolt is not compatible.
Is the handguard free-floating?
Yes. The included 10-inch M-LOK handguard is a lightweight free-float design that enhances accuracy while providing ample room for accessories.
Is this upper compatible with Mil-Spec AR-15 lowers?
Yes. It is designed to fit virtually all Mil-Spec AR-15 lower receivers.
Can this upper be used for hunting?
Yes. The 6.8 SPC II has long been a popular choice for hunters pursuing deer, hogs, and similar game where legal. Always follow local hunting laws and regulations.
What twist rate does this barrel use?
The barrel features a 1:10 twist rate, commonly used to stabilize a wide range of 6.8 SPC II bullet weights.
Is this upper made in the USA?
Yes. The Moriarti 6.8 SPC II Upper Assembly is manufactured in the USA using premium materials and Mil-Spec manufacturing standards.
Who is this upper best suited for?
This upper is ideal for builders seeking a compact, suppressor-ready AR-15, hunters looking for the proven performance of 6.8 SPC II, and enthusiasts wanting a versatile platform that uses the same bolt face as .224 Valkyrie.
