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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5" 300 Blackout Upper Assembly – AR-15 Pistol Upper with American Flag Engraving & Shark Muzzle Brake | Moriarti Armaments
Upgrade your AR-15 platform with the Moriarti 5 Inch 300 Blackout Upper Assembly, designed for shoot..
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AR-10 .308 7.5" Pistol Flash Can Upper Receiver Assembly | M-LOK Handguard | Trident Flash Suppressor | DPMS Compatible
The AR-10 .308 7.5" Pistol Flash Can Upper Receiver Assembly is a high-performance, compact upper de..
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AR-10 .308 7.75" Pistol Upper Receiver Assembly – Air-Lok Series 7" MLOK Rail, Sights
Enhance your AR-10 pistol build with the AR-10 .308 7.75" Pistol Upper Receiver Assembly, featuring ..
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AR-10 8.6 Blackout 8" Pistol Flash Can Upper Receiver Mlok Assembly / Cone – DPMS Compatible
The AR-10 8.6 Blackout 8" Pistol Flash Can Upper Receiver Mlok Assembly is designed for those who de..
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AR-10mm 5.5" Slick Side Pistol Upper with Diverter, BCG & Charging Handle - Choose Color
Build your perfect AR-10mm pistol with this 5.5" Slick Side Upper in 10mm, featuring a muzzle blast ..
-38%
AR-15 .300 Blackout 5" Micro Mini Pistol | Red Accents & Honey Badger Brace
The AR-15 MORIARTI .300 Blackout 5" Semi Auto Pistol offers a compact, high-performance package tail..
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AR-15 .300 Blackout 5" Micro Pistol Kit / 1:7 Twist / Micro Buffer / 4" M-LOK Rail
The Moriarti AR-15 .300 AAC Blackout 5" Micro Pistol Kit is a compact and powerful option for shoote..
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AR-15 300 Blackout 5" Centurion Upper Assembly / MLOK – Choose Handguard Color
5 Inch 300 Blackout Pistol Upper – Centurion M-LOK EditionUnleash compact performance with the Moria..
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AR-15 300 Blackout 5" Micro Upper Assembly / Sound Forwarder / Mlok / 1x7
Upgrade your AR-15 build with this 300 Blackout 5" Nitride Upper Assembly from Moriarti Armaments, d..
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AR-15 300 Blackout 5" PISTOL BILLET UPPER / 4'' MLOK / GOLD MUZZLE / CH
AR-15 300 Blackout 5" PISTOL BILLET UPPER / 4'' MLOK / GOLD MUZZLE BRAKE FEATURES:300 Blackout 5 Inc..
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AR-15 300 Blackout 5" Shark Pistol Kit - Side Cut Billet Upper with 4" Handguard - Classic Mini
AR-15 300 Blackout 5" Shark Pistol Kit - Side Cut Billet Upper with 4" Handguard - Classic Mini Unl..
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AR-15 300 BLACKOUT 5" SPIDER PISTOL KIT - FORGED UPPER WITH 4" HANDGUARD - COLOR SET
AR-15 300 BLACKOUT 5" SPIDER PISTOL KIT - FORGED UPPER WITH 4" HANDGUARD - COLOR SETBuild Your Own H..
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AR-15 300 BLACKOUT 5'' PISTOL BILLET UPPER / CH / 4'' MLOK / STAY SPOOKY- COLOR SET
Moriarti Armaments introduces the Stay Spooky 300 Blackout Pistol Upper, a compact, lightweight, and..
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AR-15 300 Blackout 5'' Pistol Kit - Side Cut Billet Upper, 4'' Super Slim Handguard, 'Stay Spooky' Skull Dust Cover - Color Set Options
AR-15 300 Blackout 5'' Pistol Kit - Side Cut Billet Upper, 4'' Super Slim Handguard, 'Stay Spooky' S..
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AR-15 300 BLK 5" Pistol Upper Assembly - Gold Spitfire / Mlok
Unleash precision, power, and performance with the AR-15 300 Blackout 5" Pistol Upper Assembly featu..
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AR-15 300 BLK 5'' PISTOL KIT - BILLET UPPER / 4'' HANDGUARD / CERAKOTE SPLATTER - CHOOSE COLOR
AVAILABLE IN PINK, TIFFANY BLUE, WHITE, RED AND ORANGE. CHOOSE YOUR PREFERENCE ON TOP OF PAGE.KIT IN..
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AR-15 300AAC Blackout Moriarti Arms 5" Semi Auto Mini Pistol | Honey Badger PDW Brace | Shroud
Introducing the AR-15 300AAC Blackout Moriarti Arms 5" Semi Auto Mini Pistol, built for those seekin..
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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..
-228x228.webp "AR-15 5.56/.223 5\" MICRO PISTOL KIT /4\" MLOK / COLOR ACCENT CHOICE")
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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 7.62x39 5" COMPLETE COMPRESSION SERIES MICRO PISTOL KIT - NO LOWER - CHOOSE YOUR COLOR
Make It Fun. Make It Yours.Transform your AR-15 with the 7.62x39 Micro Pistol Kit from Moriarti Arma..
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AR-15 7.62x39 5" Moriarti Minimalist Series Semi Auto Pistol | HBPDW
AR-15 7.62x39 5" Minimalist Series Semi Auto Pistol | HBPDW Adjustable Brace. Must be transfer..
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AR-15 7.62x39 5" Pistol Hybrid Upper Assembly - Spitfire / MLOK Rail
The AR-15 7.62x39 5" Pistol Hybrid Upper Assembly with Spitfire Muzzle Brake and MLOK Rail is the pe..
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AR-15 7.62X39 5" SPIDER PISTOL KIT - FORGED UPPER WITH 4" HANDGUARD - COLOR SET
AR-15 7.62X39 5" SPIDER PISTOL KIT - FORGED UPPER WITH 4" HANDGUARD - COLOR SETBuild Your Own High-P..
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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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AR-47 7.62x39 5" Cookie Cutter Upper Assembly / Mlok
Upgrade your rifle with the AR-47 7.62x39 5" Cookie Cutter Upper Assembly, featuring a Micro Length ..
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AR-47 7.62x39 5" Moriarti Micro Mini Series Semi-Auto Pistol | Color Option - Blue, FDE, ODG, Grey
The most popular pistol, Moriarti 5" Micro Mini Series Semi-Auto Pistol, is now available in co..
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AR-9 9MM 4.5" Brindle Micro ARP Pistol | LRBHO | SBA3 | Moriarti
The Moriarti AR-9 9MM 4.5" Brindle Pistol combines compact Micro ARP styling with a proven blowback ..
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AR-9 9MM 4.5" Mini Pistol Build Kit w/ SBA3 Brace - M-Lok / Non-LRBHO
AR-9 9MM 4.5" Mini Pistol Build Kit w/ SBA3 Brace - M-Lok / Non-LRBHOBuild your custom AR-9 9MM pist..
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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-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-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..