Mach Sakai does a thorough review of the KSC Beretta PMX GBB SMG, which is officially licensed, with solid construction, and modern design features like ambidextrous controls and a comfortable grip. He lists the gun's specifications, including its 2,398g weight and 48-round magazine, and praises a new numbered hop-up system for its ease of adjustment. Performance testing demonstrated that the PMX has a mild yet responsive recoil, a crisp trigger pull, and impressive gas efficiency, capable of around 260 shots per charge. Overall, the reviewer found the PMX to be accurate and effective for target shooting, concluding that its unique styling and reliable action make it an enjoyable airsoft gun.