The Season One Reloaded update has added an all-new SMG called the HRM-9 to Call of Duty: Warzone and it’s becoming a fast favorite among Warzone’s more aggressive players. This small submachine gun is highly competitive with the weapons in its class‚ and the right build makes it even better. Best HRM-9 Warzone Attachments Image: PC Invasion Since the HRM-9 already boasts exceptional mobility and handling‚ the best attachments for it will smoothen its recoil pattern and make it easier to control at longer distances. Optic: Slate Reflector Rear Grip: PCS-90 Assault Grip Magazine: 50 Round Drum Muzzle: JAK BFB Barrel: Princeps Long Barrel The real highlight of this attachment setup for the HRM-9 is the JAK BFB Muzzle‚ which grants it exceptional vertical and horizontal recoil control as well as gun kick control. This comes at the cost of mobility‚ but it’s not nearly large enough of a penalty to hinder the HRM-9. Th...