Silverback TAC-41 Variable Mass Piston

TAC-41 Variable Mass Piston, NBR piston cup (70° ), CNC AL 6061 T6 piston head, CNC AL 6061 T6 piston body, CNC steel piston end, CNC aluminium flyweight (4 pieces), CNC steel flyweight (4 pieces), PTFE grease, Tools This special piston will allow you to tweak the muzzle energy of your TAC-41 by adjusting the piston mass from 39 to 135 grams with 15 different configurations.