A hot seller amongst airsoft players is the Heckler & Koch MP7A1. There are several to choose from such as the AEG versions from the known brands as well as the GBB versions. Imn this short video review by Mach Sakai, he features the KSC MP7A1 GBB in Tan. Available in the other countries under the KWA brand, this is a good selling MP7A1 GBB. He tests it for externals, operations, and performance in a quick steel challenge.