SHS Japanese Steel AEG Upgrade Spring – M130 Parabellum Polymer parts include only the

Polymer parts include only the handguard along with the gas pipe cover

Steel thrust ball bearing

All components receive a tough tactical black coating

Four AK mags or six M4 mags

We didn't get our chops building athletic shoes

SHS Japanese Steel AEG Upgrade Spring – M130 Parabellum Polymer parts include only theSHS AEG Upgrade Spring made out of Japanese certified quenching Material, designed to work with most AEGs. Strong Strength and good screw pitch Last tens of thousands of rounds without shortening or deformation Spring Power with . 20 BBs: M90 290 300fps M100 330 350fps M110 350 380 fps M120 380 410fps M130 410 440fps M140 440 470fps M150 470 500fps