By offering additional spacing inside the compartment, the Battery Extension Unit Unit (BEU™) is designed specifically to relieve all stresses on the ARP9/ 556's components such as the MOSFET and bending of electrical cables to protect it throughout, increasing its durability.

60% MORE BATTERY SPACE

Getting ready for your next battle can be a chore taking a long time to charge up. By utilizing larger batteries ensures that you remain in the battle for longer!

OFFERING SAME LEVELS OF FLEXIBILITY

The BEU™ is designed to fit beautifully with the ARP9's original design by sitting seamlessly inside the stock compartment offering two points of shoulder adjustments to ensure compactness and maneuverability.

REMAIN IN BATTLE

Paired with the G&G ARP9 & 559 drum mag, the BEU™ will ensure a larger enough battery capacity to keep you in the fight for longer. Give your adversaries an unfair advantage now!

USE ON ALL G&G ARP MODELS

The BEU™ is highly versatile and can be used across the G&G ARP9, ARP556 and CM16 Raider L.2.0E stocks. Once installed the BEU™ eliminates the rattling butt-stock by locking-down the two metal rails!

STRONG & LIGHT CONSTRUCTION

Made of strong, flexible nylon that is resistant to BB impact and rough handling. With the extra air space inside the compartment, the BEU™ will protect the MOSFET, fuse, wires, and battery from overheating over time. Likewise, we wanted to minimize the prospect of denting the battery's surface from the cramped spacing.