SRU, busy thinking of new kits for airsoft, got something that Hi-Capa GBB users would welcome as an option kit, a PDW Kit. This kit is designed for the 5.1 and 4.3 Hi-Capa GBB Pistols from Tokyo Marui, KJ Works, WE Airsoft, and AW Custom. This allows you to have a more stable platform with your pistol especially for close quarters airsoft battles.
The Liberator Gunshop, an airsoft shop in Osaka, Japan, shows the SRU Glock PDW Conversion kit.... "This is a conversion kit that you can easily change the Glock to PDW-style with stock. Because it can be easily done with a a few screws, even people who will customize for the first time assemble it easily. Pay attention to the screw as it is the only part that you might easily lose."