Rock River Arms Introduces BT3 Operator ETR Carbine

Rock River Arms, one of the industry’s most respected names in modern sporting rifles and pistols, proudly presents the BT3 Operator ETR Carbine. Precision engineered and tailored for law enforcement applications, this rifle exemplifies Rock River Arms’ unwavering commitment to building the best MSR platforms on the market.

The RRA BT3 Operator’s ETR Carbine is a testament to Rock River Arms’ dedication to providing law enforcement professionals with the utmost accuracy and reliability in their firearms. The new .308 rifle is equipped with a 16-inch chrome barrel with a 1:10 twist rate, allowing shooters to consistently achieve tight groupings and superior performance. The chrome plating enhances durability and corrosion resistance, making it ideal for demanding law enforcement applications. With its optimized twist rate, the barrel of the BT3 Operator ETR carbine can stabilize a wide range of bullet weights, providing versatility and effectiveness in various shooting scenarios.

The RRA BT3 Operator ETR carbine incorporates several components that improve its performance and user experience. The RRA Two Stage Ultra Match Trigger provides shooters with a smooth and precise trigger pull for optimum control and accuracy. The RRA 6-Position NSP-2 Car Stock offers an adjustable length of draw and a comfortable, custom fit for each operator and the Hogue® Beavertail Grip improves ergonomics for a secure and comfortable grip. Also, the RRA 13-inch lightweight free float rail is M-LOK® Compatible, it offers ample space for accessories and attachments for customization and adaptability to specific mission requirements. Together, these components contribute to the overall professional-grade performance of the BT3 Operator ETR carbine, making it a reliable and versatile firearm for law enforcement professionals.

Rock River Arms has a long-standing reputation for excellence and remains dedicated to building the best AR-15 rifles in the industry. The RRA BT3 Operator’s ETR Carbine showcases the company’s commitment to precision engineering, quality craftsmanship, and continuous innovation. Law enforcement agencies can trust Rock River Arms to provide them with firearms that meet their exacting standards.

RRA BT3 Operator ETR Carbine Specifications

  • Caliber: .308 / 7.62X51mm Chambered NATO
  • Lower Receiver: RRA LAR-BT3 Billet Lower
  • Upper Receiver: RRA LAR-BT3 Billet A4 Upper
  • Barrel: 16-inch with chrome lining, 1:10 twist
  • Muzzle Device: A2 Flash Hider / 5/8–24 Thread
  • Gas Block: Low Profile Gas Block, Mid Length Gas System
  • Trigger: Ultra Match two-stage RRA trigger
  • Stock: RRA 6 position NSP-2 Car Stock
  • Pistol Grip: Hogue® beaver tail grip
  • Forend: RRA 13-inch lightweight free-float rail, M-LOK® Compatible
  • Weight: 8.2 Pounds
  • Length: 34.5 inches retracted
  • Accuracy: 1.5 MOA at 100 yards
  • Includes: a magazine, case, extended charging handle latch, 5-slot Picatinny rail, quick disconnect port, manual, and warranty information
  • MSRP: $1970.00

For more information on the RRA BT3 Operator ETR carbine and other firearms from Rock River Arms, visit