5" 5.56 NATO Micro ARP Spitfire Hybrid Upper Assembly – 4" M-LOK
| Brand: | Moriarti Armaments |
| Product Code: | MAR-5-556-SPITFIRE |
| Availability: | In Stock |
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$279.95
- $399.95
5" 5.56 Upper: Specs & Features
The Moriarti 5" 5.56 NATO Micro ARP Spitfire Hybrid Upper Assembly is part of Moriarti's compact Micro ARP Series. This configuration combines a 5-inch 4150 CrMoV steel barrel, micro-length gas system, 4-inch free-floating M-LOK handguard, and distinctive Spitfire QD Blast muzzle device.
The barrel features a black nitride finish, 1:5 twist rate, and 1/2×28 muzzle threads. A .750" low-profile steel gas block is paired with the micro-length gas system.
The slim-profile black M-LOK handguard provides a compact exterior, while the Spitfire QD Blast muzzle device gives this model its distinctive appearance.
The assembly is supplied without a bolt carrier group or charging handle.
Key Features
Series: Moriarti Micro ARP
Model: Spitfire Hybrid
Platform: AR-15
Caliber: 5.56 NATO / .223 Rem
Barrel: 5" 4150 CrMoV steel
Barrel Finish: Black nitride
Twist Rate: 1:5
Gas System: Micro-length
Gas Block: .750" low-profile steel
Handguard: 4" slim free-floating M-LOK
Muzzle Threads: 1/2×28
Muzzle Device: Spitfire QD Blast
Bolt Carrier Group: Not included
Charging Handle: Not included
Country of Manufacture: USA
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Moriarti Armaments |
| Series | Micro ARP |
| Model | Spitfire Hybrid |
| Platform | AR-15 |
| Caliber | 5.56 NATO / .223 Rem |
| Barrel Length | 5" |
| Barrel Material | 4150 CrMoV Steel |
| Barrel Finish | Black Nitride |
| Barrel Twist | 1:5 |
| Gas System | Micro-Length |
| Gas Block | .750" Low-Profile Steel |
| Handguard Length | 4" |
| Handguard Type | Slim Free-Float M-LOK |
| Muzzle Threads | 1/2×28 |
| Muzzle Device | Spitfire QD Blast |
| BCG | Not Included |
| Charging Handle | Not Included |
| Made in | USA |
Package Includes
One assembled 5" Moriarti Micro ARP Spitfire Hybrid upper assembly
Installed 4150 CrMoV black nitride barrel
Micro-length gas system
4" slim free-floating M-LOK handguard
Spitfire QD Blast muzzle device
Not Included: Bolt carrier group, charging handle, lower receiver, or magazine.
Frequently Asked Questions
What is the Spitfire Hybrid upper assembly?
The Spitfire Hybrid is a configuration within Moriarti's Micro ARP Series, identified by its 5" barrel, 4" M-LOK handguard, and Spitfire QD Blast muzzle device.
What is the barrel twist rate?
The barrel has a 1:5 twist rate.
Does this upper include a BCG or charging handle?
No. Neither component is included in the standard assembly.
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FAQ
Will this upper fit my AR-15 lower?
Yes. It fits any standard mil-spec AR-15 lower receiver and uses a standard 5.56 bolt carrier group and STANAG/AR-15 magazines.
Can I shoot both 5.56 NATO and .223 Remington?
Yes. A 5.56 NATO or .223 Wylde chamber safely fires both 5.56 NATO and .223 Remington ammunition.
Is a bolt carrier group included?
No. The bolt carrier group is sold separately; any standard 5.56 AR-15 BCG will work.
What twist rate does it use?
A fast 1:5 twist, chosen to stabilize bullets from a very short barrel.
Related: 5.56 NATO & .223 Wylde AR-15 uppers
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Tags: 5.56 upper, ar-15 upper, 223 wylde upper, 5 inch 5.56 upper, micro arp upper, spitfire muzzle, hybrid upper