In stock at Orga Airsoft is the FCC BCM Jack Carbine Training Weapon Conversion Kit. Made for the FCC FTW which is interchangeable with the Systema PTW, it will give the FTW the BCM Jack Carbine look with the real steel produced for a limited version. For those who want to use this for the challenge kit, they have a service available.
Take your pick of Fight Club Custom's (also known as PTW Airsoft Works) multibarrel kit... "Newest version of FCC Multi Barrel Kit set (civilian) Black with hard anodize color which allow you to choice whatever length of outer barrel you looking for which 7.5in, 10.5in, 12.5in, 14.5in, 16in, 18in, 20in & 24in. Complete set come with 7.5in Base Outer Barrel, 7in extension, 5in extension, 3in extension and CCW thread inner barrel stablizer.