Airsoft Headquarters got the KWA T6 AEG2.5 FDE AEG to check for this episode... "Newly released, the KWA T6 is back in-stock on the market after several months of patiently waiting for the industry to get back on its feet (thanks C-19) and now we have the T6 in Black and FDE *Flat Dark Earth. The KWA AEG2.5 gearbox design has an adjustable spring guide neck that can adjust the amount of tension onto the internal spring changing the velocity without having to completely swap internal springs.