Ergal bearing spring guide for third generation GEAR BOX (GM3E). MARUI 100% compatible. The shape of the shaft makes it compatible with most springs on the market. The nickel-plated AVP spring guide base provides high resistance to the pins and solidity to the rear structure of the GEAR BOX. Designed for: AK 47, AK 74, AUG, G36, SIG, KURZ / PDW, GALIL. 100% MADE IN ITALY.
