Four Rifle Viper PDW stock for MARUI M4 aeg

New retractable Strike style model 
QD extraction rods and base are made of aluminum and steel
rear polymer confort pad with anti slip design
aluminim pipe stock for mini stick lipo battery, adjustable nut to adapt the battery lenght 
extend the gun of 100mm around (stock length: 225mm)
ultra modern style give unique look to the aeg
retain screw included
compatible with Marui, G&P, G&G, KA m4 electric rifles etc....(rear body modify must be necessary)