Convert your Tokyo Marui MP5A5 NGRS into an MP5SD (perhaps an SD6) with this kit from Burst-Head. He demos the kit in this video from the Upi-Upi Team Channel... "BURST-HEAD Introducing detailed details and how to assemble the SD hand guard kit for Tokyo Marui next-generation MP5. In addition, we will tell you how to use and the performance of the popular DEEPSHOT 7.4V 800mAh battery."