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Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride

Moriarti · Upper Receiver

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Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride

Best price

$229.99at OpticsPlanet

In stock Sale Lowest in 30 dayschecked Nov 13, 2026

Buy at OpticsPlanet

Fits and works with

Caliber
5.56 / .223 · Shop matching ammo
Bolt
Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Muzzle thread
1/2x28 · Muzzle devices
Barrel length
5" · Handguards

Specifications

Manufacturer
Moriarti
Platform
AR-15
Caliber
5.56 mm NATO
Barrel length
5"
Twist rate
1:5
Thread pattern
½ x 28
Length
4"

Where to buy

StorePriceAvailabilityBuyAdd to build
OpticsPlanet $229.99Salechecked Nov 13, 2026 In stock Buy at OpticsPlanet

Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.

Price history

Lowest in-stock price in the last 30 days: $229.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 15, 2026.

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StoreLatestLowestHighest
OpticsPlanet$229.99$229.99$229.99

Since Oct 15, 2026.

About this part

The Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride is a 5" 5.56 / .223 upper receiver from Moriarti. One store lists it, OpticsPlanet at $229.99. The lowest in-stock price in the last 30 days was $229.99 at OpticsPlanet.

From the manufacturer

Moriarti AR-15 5mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride. 56 NATO 5 in Pistol Upper Assembly is precision-engineered for superior performance in a compact AR-15 pistol build. Featuring a 5-inch 4150 Chrome Moly Vanadium barrel with a nitride finish and a 1:5 twist rate this upper is ready for your Suppressor and ensures exceptional durability and accuracy. The A3 flat top upper receiver comes equipped with a forward assist and dust cover for enhanced functionality. Paired with a 4 in MLOK handguard for versatility and modularity this assembly is ready to take your AR build to the next level. Perfect for home defense or tactical use this upper does not include a bolt carrier group (BCG) or charging handle allowing you to customize your build to your preference. Specifications for Moriarti AR-15 5.56x45mm NATO 5 inch Upper Receiver: Manufacturer: Moriarti Caliber: 5.56x45mm NATO Barrel Length: 5 in Barrel Profile: Medium Gas System Length: Micro Barrel Twist Rate: 1-5 Firearms Threads Per Inch: 1/2x28 Muzzle Device: A2 Flash Hider Finish: Nitride Gun Model: AR-15 Fabric/Material: 4150 Chrome Moly Vanadium Gas Block Journal Size-Diameter: .750 in Handguard Length: 4 in Gun Rail: M-LOK Gun Make: AR Platform Package Contents: Moriarti AR-15 5.56x45mm NATO 5 inch Upper Receiver What firearm models does the manufacturer say Moriarti AR-15 5.56x45mm NATO 5 inch Upper Receiver is compatible with? The manufacturer suggests that Moriarti AR-15 5.56x45mm NATO 5 inch Upper Receiver is compatible with AR-15Moriarti MAR-556-4-A2: AR-15 5.56x45mm NATO 5 inch Upper Receiver Medium Micro Length 1-5 Twist 1/2x28 A2 Flash Hider Nitride

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