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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AR-15 4.5" Micro APR Suppressor Ready Pistol Upper Assembly – Choose Caliber & Color
The AR-15 4.5" Micro APR Suppressor Ready Pistol Upper Assembly is a compact, high-performance upper..
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AR-15 4.5" Micro ARP Pistol Upper Assembly / Mini Can - Caliber Choice
The AR-15 4.5" Micro ARP Pistol Upper Assembly with Mini Can - Caliber Choice is designed to de..
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AR-15 5" Pistol Upper Assembly | Suppressor Ready | Choose Caliber & Color
Unlock precision, power, and reliability with the AR-15 5" Pistol Upper Assembly, equipped with M-LO..
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AR-15 5.56 5" Moriarti Minimalist Series Semi Auto Pistol | HBPDW
AR-15 5.56 5" Moriarti Minimalist Series Semi Auto Pistol wit HBPDW Adjustable Brace and Shroud. FFL..
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AR-15 5.56 5" Moriarti Minimalist Series Semi-Auto Pistol | HBPDW | OD Green
The AR-15 5.56 5" Moriarti Minimalist Series Semi-Auto Pistol in OD Green combines sleek aesthetics ..
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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 | CH & Can
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" Moriarti Micro Mini Series Semi-Auto Pistol | Color Option - Blue, FDE, ODG, Grey, Bronze
The most popular pistol, Moriarti 5.56 NATO 5" Micro Mini Series Semi-Auto Pistol, is now avail..
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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 NATO 5" Pistol Upper Assembly / Red Accent / Charging Handle Included | Black Nitride Barrel
Enhance your AR-15 build with this high-performance 5.56 NATO 5" Pistol Upper Assembly, designed for..
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AR-15 5.56 NATO 5″ Pistol Upper Assembly with Charging Handle, 4″ M-LOK Handguard, 1:5 Twist, Custom Cerakote Options
This 5.56 NATO pistol features a 5" pistol length barrel with a 1:5 5R twist, all made in the USA an..
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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 5.5" Pistol Upper Assembly – Sidewinder Blast Diffuser, M-Lok Rail, Micro Gas System
The AR-15 5.56/.223 5.5" Pistol Upper Assembly is designed for shooters looking for a compact and po..
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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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AR-15 MORIARTI 5.56 NATO 5" Micro Mini Pistol with Red Accents & HBPDW Brace
The AR-15 MORIARTI 5.56 NATO 5" Semi Auto Pistol is the perfect combination of style, power, and fun..
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ARP-15 5" Cookie Semi-Auto Pistol | SBA3 Brace | Choose Caliber | Moriarti Armaments
Experience compact performance with the MA-15 Moriarti 5" Cookie Semi-Auto Pistol, an ultra-compact ..
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MA-15 Moriarti 5" Spitfire Micro Mini Semi Auto Pistol | SBA3 | Multiple Calibers
The MA-15 Moriarti 5" Spitfire Micro Mini Semi Auto Pistol is a compact powerhouse that offers excep..
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MA-15 Moriarti Arms 5.56 NATO 5" Brindle M-LOK Pistol – SBA3 Brace, Sidewinder Diffuser, and Cerakote Finish
Introducing the MA-15 Moriarti Arms 5.56 NATO 5" Brindle M-LOK Pistol, designed for performance, ver..
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Micro ARP AR-15 5.56 NATO 5" Complete Upper Assembly | Gold Spitfire QD Blast | M-LOK | Moriarti Armaments
Stand out with the Moriarti Micro ARP AR-15 5.56 NATO 5" Complete Upper Assembly, featuring an eye-c..
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Micro ARP AR-15 5.56 NATO 5" Complete Upper Assembly | Suppressor Ready | Moriarti Armaments
The MORIARTI ARP-15 5.56 NATO 5" Pistol Upper Assembly is precision-engineered for superior performa..
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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 Complet..
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Micro ARP MA-15 4.5" Semi-Auto Pistol | SBR Ready | Choose Color & Caliber | Moriarti Armaments
The MA-15 Micro ARP 4.5" Semi-Auto Pistol from Moriarti Armaments is engineered for shooters who dem..
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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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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" Micro ARP Upper | Cookie Cutter | M-LOK | Moriarti
The Moriarti AR-15 5.56 NATO 5" Cookie Cutter Upper Assembly combines aggressive styling with an ult..
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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..
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AR-15 5.56 NATO 5'' PISTOL UPPER ASSEMBLY / BILLET UPPER / GOLD MUZZLE BRAKE
AR-15 5.56 NATO 5'' PISTOL UPPER ASSEMBLY / BILLET UPPER / GOLD MUZZLE BRAKE FEATURES: Chamber:&n..
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AR-15 5.56 NATO 5'' SLICK BILLET UPPER ASSEMBLY / 4'' MLOK / SHARK / FLAG DC and CH
AR-15 5.56 NATO 5'' BILLET UPPER ASSEMBLY / 4'' MLOK / SHARK / FLAG DC and CH:Featuring a sleek desi..
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AR-15 5.56 NATO 6" Modular Pistol Upper Assembly | Hybrid MLOK | A2 Flash Hider
Upgrade your AR-15 build with the Moriarti Arms 6" 5.56 NATO Modular Pistol Upper Assembly—engineere..
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Micro ARP MA-15 5" Semi-Auto Pistol | Classic Series | Choose Caliber | Moriarti Armaments
Experience premium performance in a compact package with the MA-15 Moriarti 5" Micro ARP Classic Sem..
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AR-15 5" 5.56 NATO Micro Semi Auto Pistol | The Chameleon | Purple & Rainbow PVD Accents
The AR-15 5" 5.56 NATO Micro Semi Auto Pistol | The Chameleon combines performance and unique aesthe..