B.A.C. Airsoft tries to answer this question in this review of the KWA Ronin 47 AEG... "Hey guys, we are proud to present you our review of the KWA Ronin 47. This thing is great! It has a lot of cool features and accessories that make it worth your money. We are big fans of this KWA PWD series. They are great airsoft replica that are reliable."