Airtech Studios ARP9 / 556 Battery Extension Unit

By offering additional spacing inside the compartment, the Battery Extension Unit (BEU) is designed specifically to relieve all stresses on the ARP9’s components, while protecting it throughout to extend its durability. There are crevice’s on each side of the BEU to maintain a constant flow of ventilation to the battery and components to prevent a build-up of heat.

The BEU is designed to fit beautifully with the original design by sitting seamlessly inside the stock compartment with no modification needed to install. Made of strong, flexible nylon that is resistant to BB impact and rough handling.