Airtech Studios BEU™ (Battery Extension Unit) for G&G PDW Stocks

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This is the Battery Extension Unit for ARP 9, ARP 556, Raider L 2.0E

Helps keep your mosfet and wires from getting pinched or damaged

The extra space allows for a larger battery to be used.

Two eye holes on either side helps to keep the stock straight and stable

Fast installation with ease

60% more battery space

Air slits help to passively cool your battery and compartment 

Compatible with all ARP 9 Series