Rise Armament WATCHMANXR 6mm ARC 18-inch | RA6ARCCUBLK18

The Rise Armament WATCHMANXR complete upper is a factory-built AR-15 upper chambered in 6mm ARC. It is equipped with an 18-inch 416R stainless steel threaded barrel and a black anodized finish for durability. The assembly includes an M-LOK handguard and is configured as a complete upper receiver intended for precision and medium-range field applications such as target shooting and hunting.

Product Specifications

• The manufacturer is Rise Armament.
• The model is WATCHMANXR.
• The manufacturer’s part number is RA6ARCCUBLK18.
• The caliber is 6mm ARC.
• The barrel measures 18 inches for balanced handling.
• The barrel material is 416R stainless steel.
• The twist rate is 1:7.
• The handguard uses M-LOK attachment slots.
• The finish is anodized and the overall color is black.
• The product is supplied as a complete upper receiver.
• The platform is AR-15.
• The barrel is threaded.
• The cartridge designation is 6mm ARC.
• The product subcategory is Complete Upper Receivers.
• The UPC is 850043415947.

This complete upper is purpose-built for accuracy-focused shooters who want a ready-to-install 6mm ARC package on an AR-15 platform. The combination of an 18-inch 416R stainless barrel, 1:7 twist, and M-LOK handguard delivers a capable, serviceable assembly for precision work and medium-range field use.