Airtech Studios G&G ARP9 / ARP556 BEU Battery Extension Unit Factory Replacement Parts (OEM) Compatible with all airsoft M4

Compatible with all airsoft M4 type guns

***Picture may vary from what you receive as the color of the brass changed recently - you will be receiving a silver barrel (not brass typically)

This is the GEN 4 edition of the full frame Glock 17

The rear sight is easy to flip up and down

0E AEG - Desert Tan color - a combat machine airsoft M4 that's new for 2017

Airtech Studios G&G ARP9 / ARP556 BEU Battery Extension Unit Factory Replacement Parts (OEM) Compatible with all airsoft M4The Airtech Studios G&G ARP9 ARP556 BEU Battery Extension Unit is designed to fit on G&G ARP series of AEG guns: fits on the ARP9 and ARP556. Very easy to install so you can add longer and bigger batteries in your rear stock buffer area. With it installed, you can use 9. 6v 1600mah nun chuck, and any longer 11. 1v batteries in it, with extra room to spare. This is a must have for those that want flexibility with battery space. For the ARP9 and ARP556,