Mach Sakai checks the KSC TT-33 HW (Heavyweight) Gas Blowback pistol. This GBB pistol uses the System 7 KSC tech that gives high performance and it replicates in good detail the four-ring life ring of the muzzle to the disassembly clip serving as the tension of the slide stop. Magazine is a 10-BB gas magazine and it uses sintered parts.