The Rock River Arms Complete Upper in .223 Wylde offers exceptional versatility and precision for shooters who demand the best. Featuring a 20-inch heavy match stainless steel barrel this upper is designed for accuracy and durability. The barrel is cryogenically treated and boasts an 18 twist allowing for reliable performance with both 5.56mm and .223 caliber rounds. Equipped with an A2 flash hider and a gas block sight base it enhances shooting stability and reduces muzzle flash. The RRA NM CMP TRO aluminum handguard provides a rifle-length free float design with modular rails ensuring ample space for accessory customization. A complete package it includes a bolt carrier group and charging handle assembly making it an ideal choice for those seeking a high-quality upgrade to their firearm.