Rock River Arms

Rock River Arms LAR-15M CAR A4 Complete Upper .350 Legend 16 Barrel

All Rock River Arms upper receivers
Rock River Arms LAR-15M CAR A4 Complete Upper .350 Legend 16 Barrel - Upper Receiver for AR-15 - view 1
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Rock River Arms

Overview

The Rock River Arms LAR-15M CAR A4 Complete Upper is designed for the AR-15 platform and features a 16-inch barrel chambered in .350 Legend, offering a versatile option for various shooting applications. This complete upper assembly allows builders to easily attach it to their lower receivers while providing effective accuracy and performance for medium-range engagements. Commonly, this upper is utilized in builds intended for hunting or sport shooting, taking advantage of the .350 Legend's capabilities.

Specifications

MPN350L0326
Barrel Length16
Caliber.350 Legend
Receiver TypeA4
PlatformAR-15
AssemblyComplete

Available Merchants(4)

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KY Gun Company logo
KY Gun Company
Flat rate shipping
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In Stock
$685
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BattleHawk Armory
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Out of Stock
$563
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Optics Planet logo
Optics Planet
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Out of Stock
$640
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Classic Firearms logo
Classic Firearms
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Out of Stock
$651
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Build history on GunPartPicker

Builders on GunPartPicker first added the Rock River Arms LAR-15M CAR A4 Complete Upper .350 Legend 16 Barrel to a build in July 2026.

It was in stock most days in September 2026, but today only KY Gun Company has it in stock. The best price drifted down from $684.53 to $650.60 over September 2026 without a real sale. Buying today, the lowest price is $684.53 at KY Gun Company, above September's low of $639.99, so a better deal may come back.

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Build Configuration Breakdown

Aggregated and anonymized data showing how builders use this product

Gas System

50.3%
Mid-Length50.3%
Carbine25.7%
Pistol11.4%
Rifle10.9%
Blowback1.3%
Other0.3%

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