A light piston by SHS made from a durable polymer and steel. The implemented notches allowed to reduce its weight. The piston has 14 steel teeth which make it a reasonable choice for power tuning of replicas.
TUNE UP KIT MADE OF ERGAL FOR M4/M16 (KITM4E3)
TUNE UP KIT MADE OF ERGAL FOR AK 47/74 INNER BARREL FROM 451 TO 550mm (KAFE1)
TUNE UP KIT MADE OF ERGAL FOR M4/M16 INNER BARREL FROM 451 TO 550mm (KMFP1)
CYLINDER HEAD FOR VERSION 2 GEARBOX MADE OF ERGAL (TC02E)