Tom's Airsoft Channel got to review an AEG that uses the KWA VPS or the Variable Performance System which allows the owner to adjust the FPS to meet a game site's FPS limits. This usually comes with a 6.05mm inner barrel, a 6.75” Keymod Outer Rail handguard and the PTS Enhanced Flip-up Front and Rear Polymer Sights... "Hey guys, today I can show you the KWA TK45c including the installation of a Gate Titan."