First Factory Aluminum Strike Hop Arm for Marui M4 GBB Rifle Net-Weight-(g)_436 The Aero Wings replace the

The Aero Wings replace the battery cover on the sight

Stainless Steel Construction

-Max Output- Red Laser: 5

SG551 Series Airsoft Rifle

First Factory Aluminum Strike Hop Arm for Marui M4 GBB Rifle Net-Weight-(g)_436 The Aero Wings replace theTokyo Marui M4A1 MWS Airsoft Gas Blowback Rifle GBB is known for its stable accuracy, but with its original chamber hop arm, the Hop tends to be weak, and lacks performance for long distance shots. LayLax have redesigned the shape of the arm, to get better and stronger Hop up compared to its original Hop arm. It can also be adjusted to non hop status, so it is compatible for both long and close distance. First Factory Strike Hop Arm for Marui M4 MWS