This video from Airsoft Taiwan features the EMG SAI Tier1 Upgrade Kit for VFC Glock Gen3 Gas Blowback Pistol. All the upgrade parts included in this kit are CNC-machined such as the Steel slide, Steel Outer Barrel, Steel barrel protector, rear & front sight set, and Aluminum trigger. You can order it right now from the Airsoft Taiwan online store for US$400, shipping costs not yet included.