Mach Sakai goes over the BOLT MP5K P.E.A.K.E.R. with BEAST ETU that uses many new mold parts centering on the front and rear sections. This is equipped with a proven recoil unit "PEAKER BRSS" that was updated in Spring 2019 via joint development by Sekito and BOLT. It is a model with full shooting experience that the whole compact body vibrates due to the improved simulated recoil. Also, the realistic appearance of the steel-pressed upper frame and the recoil disable mechanism common to the BOLT MP5 series are also part of the feature.