Micro ARP
Micro ARP AR-15 5.56 NATO 5" Hybrid Complete Upper Assembly | Spitfire QD Blast | M-LOK | Moriarti Armaments
Take your next Micro ARP build to the next level with the Moriarti AR-15 5.56 NATO 5" Hybrid Complete Upper Assembly. Purpose-built for ultra-compact AR pistol configurations, this premium upper delivers the proven performance of 5.56 NATO in a lightweight package designed for shooters who demand reliability, maneuverability, and premium craftsmanship.
Built around a 5-inch 4150 CrMoV barrel with a micro gas system, this ARP upper features a Spitfire QD Blast muzzle device, 4-inch slim-profile M-LOK handguard, and durable black nitride finish for dependable performance and long service life. Whether you're building a mini ARP, upgrading an existing micro AR pistol, or completing a custom AR project, this upper provides an outstanding balance of compact size and premium quality.
Designed for compatibility with mil-spec AR-15 lower receivers, this upper does not include a bolt carrier group or charging handle, allowing you to customize your build with the components of your choice.
Specifications
- Platform: AR-15 / Micro ARP
- Caliber: 5.56 NATO / .223 Rem
- Barrel Length: 5"
- Barrel Material: 4150 CrMoV Steel
- Barrel Finish: Black Nitride
- Twist Rate: 1:5
- Muzzle Threads: 1/2x28
- Muzzle Device: Spitfire QD Blast
- Gas System: Micro
- Gas Block: .750 Low Profile Steel
- Handguard: 4" Slim Free-Float M-LOK
- Overall Length: 15"
- Weight: 2.5 lbs
- BCG: Not Included
- Charging Handle: Not Included
- Made in USA
Shop Related Categories
What is a hybrid AR-15 upper?
A hybrid AR-15 upper combines premium performance components with a compact, lightweight design to create a versatile upper assembly. In the Micro ARP platform, a hybrid upper pairs a short barrel, free-float handguard, and optimized gas system to maximize reliability while maintaining excellent maneuverability and modularity.
Note: does not include BCG/CH. Images may not be the exact representation of the product.
