Airtech Studios KWA TK45 and Ronin PDW BEU Battery Extension Unit Bipods This is a must-have for

This is a must-have for any ARP9 user

you can decrease or increase your sniper rifle's FPS to whatever you want

These new guns feature a full metal keymod rail system with monolithic top rail

The regulated Co2 output will keep you field legal

Airtech Studios KWA TK45 and Ronin PDW BEU Battery Extension Unit Bipods This is a must-have forThe 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