Airtech Studios KWA TK45 and Ronin PDW BEU Battery Extension Unit Bipods Gate NanoAAB Mosfet is one

Gate NanoAAB Mosfet is one of the highest quality airsoft MOSFET units out there

which can be found just about anywhere

AEGs must use a Maple Leaf AEG style bucking to fit properly (non-Maple Leaf AEG buckings may not work)

Fluted style bull barrel

This is a must-have for any ARP9 user

Airtech Studios KWA TK45 and Ronin PDW BEU Battery Extension Unit Bipods Gate NanoAAB Mosfet is oneThe Airtech Studios KWA TK45c and KWA PDW BEU Battery Extension Unit. 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. Can fit up to a Titan 3000 nun chuck 11. 1v. Installation is drop in, no tools or anything