300 Blackout AR-15 Build Kits | .300 BLK Rifle & Pistol Kits

Complete .300 Blackout Build Kits

Build your next AR-15 with premium 300 Blackout kits from Moriarti Armaments. Our complete 300 Blackout AR-15 kits include quality components for rifle and pistol configurations, making it easy to build a dependable firearm for hunting, recreational shooting, target practice, and suppressed applications. Choose from a variety of barrel lengths, handguard styles, finishes, and configurations to match your shooting needs. Designed for compatibility with Mil-Spec AR-15 components, our 300 Blackout build kits deliver reliable performance, excellent accuracy, and the versatility that has made 300 AAC Blackout one of today's most popular AR-15 calibers.

Why choose a 300 Blackout kit instead of buying parts separately?

A 300 Blackout build kit provides compatible components selected to work together, simplifying the assembly process while helping ensure reliable performance. Whether you're building a compact ARP 300 pistol or a full-size rifle, a complete kit saves time and eliminates the guesswork of sourcing individual parts.