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.
Read our complete Micro ARP Buyer's Guide →
Refine Search
-33%
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..
-40%
AR-10 .308 7.75" High Power Tactical Pistol Kit | SBA3, M-LOK | DPMS Compatible
The AR-10 .308 7.75" High Power Tactical Pistol Kit is your go-to solution for building a custom, hi..
-43%
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 ..
-23%
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..
-600x600-228x228.webp "AR-10MM 4\" Slick Side Complete Cone Upper – M-LOK, Non-LRBHO | Moriarti Arms")
-27%
AR-10MM 4" Slick Side Complete Cone Upper – M-LOK, Non-LRBHO | Moriarti Arms
Built for compact power and sleek design, the AR-10MM 4" Slick Side Cone Complete Upper by Moriarti ..
-20%
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..
-35%
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..
-38%
AR-15 300 AAC Blackout 5" Slick Profile Pistol Upper Assembly – Shark Muzzle Brake / American Flag Engraving
Elevate your shooting experience with the AR-15 300 AAC Blackout 5" Slick Profile Pistol Upper Assem..
-40%
AR-15 300 Blackout 5" Centurion Upper Assembly / MLOK – Choose Handguard Color
AR-15 300 Blackout 5" Centurion Upper Assembly / Color MLOK – Choose Your ColorUnleash unmatched pre..
-43%
AR-15 300 Blackout 5" Micro Pistol Upper Assembly / Suppressor Ready – Moriarti Arms
The Moriarti AR-15 300 Blackout 5" Micro Pistol Upper Assembly is built for shooters who demand high..
-38%
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..
-34%
AR-15 300 Blackout 5" Moriarti Micro Mini Series Semi-Auto Pistol | Ergo Grip | Micro Buffer
The AR-15 300 Blackout 5" Moriarti Micro Mini Series Semi-Auto Pistol is built for enthusiasts seeki..
-38%
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..
-33%
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..
-28%
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..
-30%
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..
-43%
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..
-36%
AR-15 300 BLK 5" Complete Compression Series Micro Pistol Kit – Customize Your Build with Your Personal Color
AR-15 300 BLK 5" Complete Compression Series Micro Pistol Kit – Customize Your Build Make it fun. M..
-33%
AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail
AR-15 300 BLK 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail is designed with compatibil..
-36%
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..
-27%
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..
-46%
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..
-42%
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..
-33%
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..
-20%
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..
-38%
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..
-41%
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..
-43%
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 ..
-28%
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..
-44%
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..
-25%
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..
-20%
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 ..
-30%
AR-15 5.56 NATO 5" Pistol Upper Assembly / Gold Spitfire/ Mlok
AR-15 5.56 NATO 5" Pistol Upper Assembly with Gold Spitfire and 4" M-LOK HandguardElevate your shoot..
-50%
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..
-50%
AR-15 5.56 NATO 5'' PISTOL UPPER / BLUE ACCENT / CH / CAN
AR-15 5.56 NATO 5" Pistol Upper Assembly - Blue Accent | Charging Handle Included | Black Nitride Ba..
-40%
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")
-28%
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..
-25%
AR-15 5.56/.223 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail
AR-15 5.56/.223 5" Pistol Hybrid Upper Assembly / Spitfire/ Mlok Rail - current ETA 4-7 weeksFo..
-47%
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..
-35%
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..
-44%
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..
-41%
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..
-228x228.webp "AR-15 7.62x39 5\" Pistol Hybrid Upper Assembly - Spitfire / MLOK Rail")
-33%
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..
-39%
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..
-35%
AR-15 MORIARTI 5" MICRO PISTOL / CENTURION / MAG - CHOOSE COLOR AND CALIBER
Make it yours. The AR-15 Moriarti 5" Micro Pistol is designed for those who demand performance, prec..
-20%
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..
-38%
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 ..
-42%
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..
-49%
AR-74 7.62x39 5" Micro Pistol Upper Assembly / Suppressor Ready – Moriarti Arms
The MORIARTI AR-74 7.62x39 5" Micro Pistol Upper Assembly delivers compact power and versatility for..