Micro ARP 300 Blackout
Micro ARP 300 Blackout builds are designed to deliver exceptional performance from compact AR platforms. The 300 BLK cartridge was specifically developed for short barrels, making it one of the most popular choices for Micro ARP pistols, uppers, and custom builds.
Whether you're building a compact range firearm, home-defense platform, or suppressor-ready setup, 300 Blackout provides excellent energy, versatility, and reliability in short-barrel configurations.
Browse our selection of Micro ARP 300 BLK pistols, uppers, barrels, and components engineered for compact performance.
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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 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..
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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..
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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..
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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" 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..
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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" 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..
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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..
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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 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..
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MA-15 Moriarti 5" Cookie Semi-Auto Pistol / Choose Caliber / SBA3 Brace - Lightweight, Precision Performance
MA-15 Moriarti 5" Cookie Semi-Auto Pistol / Choose Caliber / SBA3 Brace - Lightweight, Precision Per..
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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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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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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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MA-15 MORIARTI 5" MINI SEMI AUTO PISTOL / CLASSIC DESIGN W / MAG - CHOOSE CALIBER
Elevate your shooting game with the AR-15 Moriarti 5" Mini Series Pistol. Customizable, durable, and..