Moriarti AR-9 5.5" LRBHO Slick Side Complete Upper Assembly with BCG - 9MM

Uppers

Moriarti AR-9 5.5" LRBHO Slick Side Complete Upper Assembly with BCG and CH - 9MM

The Moriarti AR-9 5.5" LRBHO Slick Side Complete Upper Assembly is a top-tier 9MM AR-9 upper built for pistol caliber carbine (PCC) enthusiasts. Designed for maximum reliability, it features a slick side upper receiver with Last Round Bolt Hold Open (LRBHO) function and high-quality components for superior performance. Ideal for building an AR-9 pistol or carbine, this upper ensures smooth cycling, precision accuracy, and durability.

Key Features:

• 5.5" 9MM Match-Grade Barrel: Crafted from 4150 Chrome Moly Steel with a black nitride finish for enhanced durability and corrosion resistance. The barrel features a 1:10 twist rate for optimal accuracy and is threaded with 1/2x36 threads, finished off with an A2 flash hider to minimize muzzle flash.

• Slick Side LRBHO Upper Receiver: The slick side design eliminates unnecessary forward assist features, creating a sleek and lightweight upper receiver. It’s built from 7075-T6 billet aluminum and anodized per MIL-8625 Type 3 Class 2 standards for superior strength and corrosion resistance. The Last Round Bolt Hold Open (LRBHO) feature ensures the bolt stays locked back after the last round is fired, enhancing reliability and user experience.

• Blowback Gas System: Optimized for blowback operation, this system ensures smooth and consistent cycling with minimal recoil. Perfect for 9MM builds, it delivers reliable performance across a wide range of shooting scenarios.

• Lightweight Free-Floating MLOK Handguard: The included 4" MLOK handguard is crafted from aircraft-grade aluminum and finished with a black hardcoat anodize for durability. The free-floating design ensures no contact between the barrel and handguard, improving accuracy.

• AR-9 9MM Ramped Bolt Carrier Group (BCG): The included AR-9 ramped BCG is made from US-made 8620 steel and finished with mag phosphate for added durability. This BCG is compatible with both Glock and Colt-style magazines and features a M-16 cut, making it suitable for full-auto configurations (subject to BATFE regulations).

• Fully Assembled and Tested: The upper assembly comes fully assembled, test-fired, and ready to install on your compatible AR-9 lower. Just add your preferred lower parts and a magazine, and you're ready to shoot.

Why Choose the Moriarti AR-9 5.5" LRBHO Slick Side Upper Assembly?

This slick side upper assembly is the perfect choice for building a high-performance AR-9 pistol or carbine. With its LRBHO feature and match-grade barrel, you’ll experience smooth cycling, enhanced accuracy, and top-notch reliability. Whether you’re using it for target practice, home defense, or competitive shooting, the Moriarti AR-9 5.5" LRBHO Slick Side Upper Assembly is engineered to meet your demands.

Uppers are produced on ongoing manufacturing basis. Please expect 8-10 week production schedule ETA before ship.