Micro ARP Pistols & Compact AR Builds
Explore Moriarti Arms Micro ARP pistols, compact AR uppers, and short-barrel AR platform builds designed for shooters who want a smaller, maneuverable AR-style setup. This collection includes popular compact configurations in 7.62x39, 300 Blackout, 9mm, 10mm, and 5.56, with options for different barrel lengths, handguards, and build styles.
Whether you are looking for a micro AR pistol, compact PCC-style build, or short AR upper assembly, this category brings our most popular Micro ARP configurations into one easy-to-shop collection.
Looking for an ultra-compact setup? Our Micro ARP collection includes 3-inch, 4-inch, 4.5-inch, and 5-inch configurations in several calibers. These small AR-platform pistols prioritize compact dimensions while offering multiple caliber, color, and component options for different build preferences.
Read our complete Micro ARP Buyer's Guide →
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ARP 9MM 3" Micro Complete Upper | AR-9 Pistol Upper | M-LOK | Moriarti Armaments
Experience maximum compactness with the Moriarti ARP 9MM 3" Micro Complete Upper Assembly. Designed..
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ARP-10 .308 Winchester 7.75" High Power Tactical Pistol Kit | Micro AR Pistol | SBA3 | M-LOK | DPMS Compatible | Moriarti Armaments
Experience the power of .308 Winchester in a compact ARP-10 platform with the Moriarti ARP-10 7.75" ..
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ARP-10 6.5 Creedmoor 7.5" Hybrid Complete Upper Assembly | Pistol Gas | Shroud | Moriarti Armaments
Upgrade your AR-10 project with the ARP-10 6.5 Creedmoor 7.5" Hybrid Upper Receiver Assembly, design..
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ARP-10 8.6 Blackout 8" Tactical Mini Pistol | DPMS Pattern | M-LOK | Moriarti Armaments
Experience uncompromising power in a compact package with the Moriarti ARP-10 8.6 Blackout 8" Tactic..
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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-10 .308 WIN MORIARTI 7.5" PISTOL / CHOOSE YOUR CERAKOTE COLOR / SUPPRESSOR READY
Crafted for the discerning shooter, the MA-10 .308 Win Moriarti 7.5" Pistol delivers outstanding pow..
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MA-10MM 4" Micro ARP Pistol – Glock Style | SBR Ready | Anodized Color Choice
Introducing the MA-10MM 4" Micro ARP Pistol, a compact 10mm AR-style pistol built around a Glock-mag..
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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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MA-40 .40 S&W Moriarti Arms 4" 'Brindle' Pistol – SBA3 Brace, Blowback System, Mlok, Custom Cerakote
Introducing the AR-40 .40 S&W 'Brindle' Pistol by Moriarti Arms, a premium .40 caliber semi-auto..
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MA-9 9MM 4.5" MICRO ARP GLOCK STYLE PISTOL / NON-LRBHO - CHOOSE COLOR
The MA-9 9MM 4.5" Micro Arp Glock Style Pistol was developed by Moriarti Armaments to utilize a..
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MA-9 9MM 4.5" Micro ARP Pistol – Glock Style | SBR Ready | Color Choice
The Moriarti MA-9 9MM 4.5" Micro ARP Pistol delivers an ultra-compact 9mm AR-platform configuration ..
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MA-9 9MM 4.5" Micro Glock Style Pistol Kit - Choose Color | Non-LRBHO
MA-9 9MM 4.5" Micro Glock Style Pistol Kit - Choose Color | Non-LRBHO - Complete Your DIY 9MM Projec..
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MA-9 9MM 4.5" Mini Semi Auto Pistol | Slick Side |Classic | Glock Style
The MA-9 9MM Mini Semi Auto Pistol delivers compact power and innovative design. Built for performan..
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MA-9 9MM MORIARTI 4.5" ENHANCED SPORTING MINI GLOCK STYLE PISTOL - NON-LRBHO, SBA3
FFL Transfer RequiredThe MA-9 9MM 4.5" Enhanced Sporting Mini Glock Style Pistol offers exceptional ..
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Micro ARP 300 Blackout 5" Complete Upper Assembly | AR-15 Pistol Upper | Suppressor Ready | Moriarti Armaments
The Moriarti Micro ARP 300 Blackout Upper Assembly is designed for shooters looking for a compact, v..
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Micro ARP AR-15 300 Blackout 5" Hybrid Complete Upper Assembly | Spitfire Flash Can | M-LOK | Moriarti Armaments
Build the ultimate Micro ARP with the Moriarti AR-15 300 Blackout 5" Hybrid Complete Upper Assembly...
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Micro ARP AR-15 300 Blackout 5" Semi-Auto Pistol | Ergo Grip | Micro Buffer | Moriarti Micro Mini Series
Experience the next evolution of the Micro ARP with the Moriarti AR-15 300 Blackout 5" Micro Mini Se..
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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 AR-74 7.62x39 5" Complete Upper Assembly | Suppressor Ready | Moriarti Armaments
The MORIARTI ARP-74 7.62x39 5" Micro Pistol Upper Assembly delivers compact power and versatility fo..
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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 AR-10 .308 7.5" Hybrid Upper Receiver Assembly – MLOK / Shroud
Upgrade your AR-10 project with the AR-10 .308 7.5" Hybrid Upper Receiver Assembly, designed for sho..
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Moriarti AR-10 .308 7.75" Pistol Kit – Tactical Mini Build, DPMS Low Profile Compatible
The AR-10 .308 7.75" High Power Tactical Pistol Kit is designed for those who demand Mil-Spec perfor..
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Moriarti AR-10 8" 8.6 Blackout Big Gunner Upper Assembly / Muzzlok
Moriarti AR-10 8" 8.6 Blackout Big Gunner Upper Assembly with Muzzlok is a perfect addition to your ..
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Moriarti AR-10 8.6 Blackout 8" Hybrid Upper – M-LOK, Shroud, Big Bore Build
Enhance your shooting experience with the AR-10 8.6 BLACKOUT 8" Hybrid Upper Receiver Assembly, desi..
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Moriarti AR-10MM 5.5" Slick Side Micro Pistol Complete Upper / Shroud / BCG & Charging Handle - Non-LRBHO
Key Features5.5-inch 10mm barrel, 4150 CrMoV steel, nitride finish, 1:16 twist, 5/8x24 thread pitch5..
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Moriarti AR-47 7.62x39 5" Moriarti Minimalist Series Semi Auto Pistol | Ergo | Micro Buffer
The AR-47 Minimalist Series Pistol by Moriarti Arms delivers a compact, rugged, and powerful platfor..
-600x600-600x600%20(1)-228x228.webp "Moriarti AR-9 4.5\" Pistol Upper Assembly with Flash Can, BCG, and Charging Handle - Non-LRBHO")
-228x228.webp "Moriarti AR-9 4.5\" Pistol Upper Assembly with Flash Can, BCG, and Charging Handle - Non-LRBHO")
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Moriarti AR-9 4.5" Pistol Upper Assembly with Flash Can, BCG, and Charging Handle - Non-LRBHO
The AR-9 4.5" Pistol Upper is designed for compact performance and reliable operation in your 9mm AR..
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MORIARTI AR-9 9MM 4.5" DIAMOND CUT 4" MLOK UPPER ASSEMBLY / MULTIPORT / CH
The Moriarti AR-9 9mm 4.5 Diamond Cut 4 M-Lok Upper Assembly with a multiport feature, including an ..
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Moriarti AR-9 9MM 4.5" Pistol Upper Assembly with BCG and Charging Handle - Slick, Non-LRBHO
The AR-9 9mm 4.5" Pistol Upper Assembly delivers outstanding performance and versatility in a compa..
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Moriarti AR-9 9MM 4.5" Slick Side Micro Pistol Upper / Shroud / BCG & Charging Handle - Non-LRBHO
Upgrade your AR-9 pistol build with the AR-9 9MM 4.5" Slick Side Micro Pistol Upper. This complete u..
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MORIARTI AR-9 9MM 4.5" SLICK SIDE PISTOL UPPER ASSEMBLY /7" FAKE CAN / BCG & CH / NON LRBHO
The AR-9 9mm 4.5 Slick Side Pistol Upper Assembly with a 7 inch Fake Can, including BCG (Bolt Carrie..
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Moriarti Armaments AR-15 300 Blackout 5" Cookie Cutter Upper Assembly
Elevate your shooting experience with the Moriarti Armaments 300 Blackout 5" Cookie Cutter Upper Ass..
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Moriarti Arms .45 ACP 4.5" Barrel Blowback AR-45 Pistol Kit - Slick Side Upper, M-LOK, Non-LRBHO
Build your AR-45 pistol with this Moriarti Arms 4.5" Barrel Blowback Kit. Designed for Glock-style l..
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Moriarti Arms AR-10MM 4" Micro Glock Style Pistol | Anodized Black | Non-LRBHO | Blowback
The Moriarti Arms AR-10MM 4" Micro Glock Style Pistol offers superior power and precision in a compa..
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Moriarti Arms AR-40 S&W 4" Mini Glock Style Pistol | Anodized Black | Non-LRBHO | SBA3
The Moriarti Arms AR-40 S&W 4" MiNI Glock Style Pistol delivers the power and precision of the ...
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Moriarti Arms MA-45 4" Micro Glock-Style Pistol | SBR Ready |Custom Color Options, Non-LRBHO
The Moriarti Arms MA-45 4" Micro Glock-Style Pistol brings superior performance and customization to..
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Moriarti Arms MA-45 4.5" Blowback .45 ACP Glock-Style Pistol | A2 Compensator, Non-LRBHO
The Moriarti Arms MA-45 4.5" Blowback .45 ACP Glock-Style Pistol delivers precision and durability i..
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Moriarti Arms MA-45 4.5" Mini Slick .45 ACP Glock-Style Pistol with SBA3 Brace | Blowback, Non-LRBHO
The Moriarti Arms MA-45 4.5" Mini Slick .45 ACP Glock-Style Pistol is the ultimate blend of performa..
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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-40 S&W 4" Enhanced Sporting Series Mini Glock Style Pistol – SBA3 Brace, FDE, Non-LRBHO
Introducing the Moriarti MA-40 S&W 4" Enhanced Sporting Series Mini Glock Style Pistol, a high-p..
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AR-10MM 5.5" Micro ARP 10mm AR-15 Pistol Kit /Slick / Suppressor Ready
This Micro ARP 10mm AR-15 Pistol Build Kit is configured for the SBR Ready designation. The kit cent..
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AR-10MM 5.5" MLOK COMPLETE PISTOL KIT /SLICK SIDE / NON-LRBHO
Moriarti Arms, Blow Back, 10MM, 5.5" Barrel, Black Finish, Slick side upper, Non-LRBHO, Mlok, Glock ..
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AR-15 300 Blackout 6" Modular Pistol Upper Assembly / Hybrid Mlok / A2
AR-15 300 Blackout 6" Modular Pistol Upper Assembly | Hybrid MLOK | A2 Flash HiderFeatures:Premium B..
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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..