Airsoft Review France just updloaded their latest review last Sunday, 03 November 2013. This review covers the newly released Bolt B4 BRSS SOPMOD which has the new generation Bolt Recoil Shock System (BRSS) which they claim to have a heavier kick and blowback as compared to the first generation BRSS. As the review is in the French language, just turn your language captions to understand the review.