Micro ARP 5.56
Micro ARP 5.56 builds deliver the familiar performance and versatility of the AR platform in a compact, maneuverable package. Designed for shooters who want a lightweight and customizable firearm, these short-barrel 5.56 configurations are ideal for range use, training, and modern sporting applications.
The 5.56 NATO cartridge remains one of the most popular AR-platform calibers thanks to its widespread availability, manageable recoil, and proven performance. Micro ARP 5.56 pistols and uppers provide AR enthusiasts with a compact solution while maintaining compatibility with many standard AR components and accessories.
Browse our selection of Micro ARP 5.56 pistols, uppers, barrels, and components designed for compact AR performance.
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4.5" Micro ARP Upper Assembly – 5.56, .300 BLK, 7.62×39 & .338 ARC | Mini Can
The Moriarti 4.5" Micro ARP Upper Assembly with Mini Can is a compact AR-15 upper configuration avai..
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5" 5.56 NATO AR-15 Pistol Upper Assembly – 1:5 5R Barrel, Custom Color Accents
The Moriarti 5" 5.56 NATO AR-15 Pistol Upper Assembly features a 4150 steel barrel with black nitrid..
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5" 5.56 NATO Micro ARP Cookie Cutter Upper Assembly – 4" M-LOK
The Moriarti AR-15 5.56 NATO 5" Cookie Cutter Upper Assembly combines aggressive styling with an ult..
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5" 5.56 NATO Micro ARP Gold Spitfire Upper Assembly – 4" M-LOK
Stand out with the Moriarti Micro ARP AR-15 5.56 NATO 5" Complete Upper Assembly, featuring an eye-c..
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5" 5.56 NATO Micro ARP Gradient Series Upper Assembly – Side-Cut Billet, 4" M-LOK
The Moriarti 5" 5.56 NATO Micro ARP Gradient Series Upper Assembly brings custom styling and distinc..
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5" 5.56 NATO Micro ARP Red Accent Pistol Upper Assembly with Charging Handle
The Moriarti 5" 5.56 NATO Micro ARP Red Accent Pistol Upper Assembly features a compact configuratio..
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5" 5.56 NATO Micro ARP Shark Flag Upper Assembly – Slick Billet, 4.2" M-LOK
The Moriarti 5" 5.56 NATO Micro ARP Shark Flag Upper Assembly combines distinctive custom accents wi..
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5" 5.56 NATO Micro ARP Sidewinder Pistol Upper Assembly – M-LOK
The Moriarti 5" 5.56 NATO Micro ARP Sidewinder Pistol Upper Assembly is part of the Moriarti Micro A..
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5" 5.56 NATO Micro ARP Spitfire Hybrid Upper Assembly – 4" M-LOK
The Moriarti 5" 5.56 NATO Micro ARP Spitfire Hybrid Upper Assembly is part of Moriarti's compact Mic..
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5" 5.56 NATO Micro ARP Suppressor Ready Upper Assembly – 4" M-LOK, A2 Flash Hider
The Moriarti 5" 5.56 NATO Micro ARP Suppressor Ready Upper Assembly is part of Moriarti's Micro ARP ..
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5" AR-15 Suppressor Ready Pistol Upper Assembly – Choose Caliber & Color
The Moriarti 5" AR-15 Suppressor Ready Pistol Upper Assembly is available in 5.56 NATO, .300 AAC Bla..
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AR-15 4.5" Micro ARP Suppressor Ready Pistol Upper Assembly – Multiple Calibers & Colors
The Moriarti 4.5" Micro ARP Suppressor Ready Pistol Upper Assembly is a compact AR-platform upper of..
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AR-15 5.56 NATO 5" BEWARE PISTOL KIT - MLOK - MICRO
Unleash your inner gunsmith with the AR-15 5.56 NATO 5" Pistol Kit, designed for performance, precis..
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AR-15 5.56 NATO 5" Micro ARP Pistol Upper – Blue Accent
The Moriarti AR-15 5.56 NATO 5" Pistol Upper combines compact Micro ARP styling with distinctive blu..
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AR-15 5.56 NATO 5" PISTOL KIT - SIDE CUT BILLET UPPER WITH 4" COMBAT MODULAR M-LOK HANDGUARD - BURNT BRONZE CERAKOTE ACCENTS
Build your dream AR-15 pistol with this high-performance 5.56 NATO 5" Pistol Kit, featuring side cut..
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AR-15 5.56 NATO 5" Pistol Kit - Side Cut Billet Upper with 4" Handguard | Gradient Color Option
Transform your AR-15 build with this 5.56 NATO 5" Pistol Kit, designed for superior performance and ..
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AR-15 5.56/.223 5" MICRO PISTOL KIT /4" MLOK / COLOR ACCENT CHOICE
Build Your Own Micro AR Pistol with Ease – This comprehensive kit includes everything you need to as..
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AR-15 5.56/.223 5″ Micro Pistol Kit – 1:5 Twist, Micro Buffer, 4″ M-LOK Rail, Mil-Spec Components
The AR-15 5.56/.223 5″ Micro Pistol Kit from Moriarti Armaments offers a compact and powerful AR pis..
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Micro ARP MA-15 4.5" Semi-Auto Pistol | SBR Ready | Choose Color & Caliber | Moriarti Armaments
The Moriarti MA-15 4.5″ Micro ARP is a semi-automatic AR15-platform pistol available in multiple cha..
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Moriarti MA-15 5" Micro ARP Pistol | Mil-Spec Buffer | SBR Ready | Choose Caliber & Color
The Moriarti Micro ARP AR-15 5" Semi-Auto Pistol is built for shooters who demand premium performanc..
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Moriarti MA-15 5.56 NATO 5″ Micro Mini Series Pistol – Choose Color
The Moriarti MA-15 Micro Mini Series is a compact AR-platform semi-automatic pistol chambered in 5.5..
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AR-15 5" 5.56 NATO PISTOL KIT / MLOK / CERAKOTE ACCENT / CLASSIC
AR-15 5" 5.56 NATO PISTOL KIT / MLOK / CERAKOTE ACCENT / CLASSIC. The kit comes WITHOUT 8..
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AR-15 5.56 NATO 5" Moriarti Micro Mini Series Semi-Auto Pistol | Ergo Grip | Micro Buffer
The AR-15 5.56 NATO 5" Moriarti Micro Mini Series Semi-Auto Pistol is engineered for those who appre..
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AR-15 5.56 NATO 5" Pistol Kit - Forged Upper, 4" M-LOK, Choose Your Accent Color: Blue, Silver, or Gold
Build your dream AR-15 pistol with this 5.56 NATO 5" Pistol Kit, designed for ultimate performance a..