Rock River Arms Tactical Carbine, 16″ Barrel, RRA 13″ Free Float M-LOK Handguard, Black, 10 Rounds

Product Description

The Rock River Arms 350 Legend tactical carbine upper receiver is a complete, ready-to-install conversion solution for shooters seeking modern caliber versatility. This RRA upper features a 16-inch barrel paired with Rock River’s Operator Muzzle Brake for reduced recoil and flash. Additionally, the 13-inch free float M-LOK handguard provides excellent modularity for accessories and rail attachments.

Complete Upper Assembly

This product arrives fully assembled with bolt carrier group and charging handle included. Furthermore, you receive one 10-round magazine for immediate use. The anodized black finish resists corrosion and wear during extended shooting sessions. Therefore, minimal assembly work is required before mounting to any AR-15 lower receiver.

350 Legend Performance and Caliber Conversion

The 350 Legend caliber offers an ideal middle ground between .223 Remington and larger hunting rounds. In addition, shooters benefit from reduced recoil, lower ammunition costs, and superior stopping power for training and sport shooting. This RRA Tactical Carbine upper is perfect for filers seeking a dedicated trainer or those building a multi-platform rifle system. Moreover, the 350 Legend remains legal in states restricting smaller centerfire calibers.

AR-15 Compatibility and Reliability

This complete upper receiver fits all standard AR-15 lower receivers without modification. Additionally, Rock River Arms maintains strict quality control across all manufacturing. The free float design enhances accuracy by isolating the barrel from handguard pressure. As a result, you achieve consistent shot placement whether training or competing at the range.

Ordering from Western Sport

Order online and it ships straight to your door. Western Sport has been a licensed FFL/SOT dealer since 2007, and everything we sell carries the full manufacturer warranty. Questions before you order? Send us a message.

Frequently Asked Questions

Q: Will this 350 Legend upper fit my AR-15 lower receiver?

A: Yes, this Rock River Arms complete upper receiver is fully compatible with all standard AR-15 lower receivers. No modifications to your lower are necessary—simply attach the upper and you are ready to shoot.

Q: What does this upper receiver include?

A: The RRA Tactical Carbine upper comes complete with the bolt carrier group, charging handle assembly, one 10-round magazine, and all hardware needed for installation. It requires only a compatible AR-15 lower receiver to function.

Q: What is the process for purchasing this upper as a Texas resident?

A: As a licensed FFL dealer, Western Sport can sell this upper directly to qualified Texas residents without transfer delays. Simply Send us a message to verify availability, place your order, and complete the transaction at our location.

Q: Is this 350 Legend upper best for training or hunting?

A: This RRA upper excels at both training and sport shooting thanks to low recoil, affordable ammunition, and excellent accuracy from the free float barrel. Shooters often use 350 Legend uppers for dedicated range trainers or to build multi-caliber AR-15 systems.

Additional information