Rocket Airsoft M120 AEG Spring - Japanese Black Steel midcap The A4 model has a

The A4 model has a fixed rear stock with lots of battery room in its back

in Black is a simple yet highly functional polymer pistol grip for the M4/M16

Simple low-profile metal scope mount that fits on most of the MP5 guns that have the two pairs of tabs on the upper receiver

this bipod provides a stable shooting platform

Rocket Airsoft M120 AEG Spring - Japanese Black Steel midcap The A4 model has aRocket Airsoft M120 AEG Spring Japanese Black Steel. One of our most popular airsoft upgrade springs! Very high quality steel made spring to get your gun running just below 400 FPS. Fits in all standard gearboxes. This is your standard upgrade spring strength for upgrades. (please note: packaging may be generic or labeled as 'Rocket Airsoft', but is made by SHS OEM) This is a non linear spring utilizing Japanese made steel spring material. Black color