General Information Upgrades include: Madbull M120 spring, metal spring guide with bearings,Modify Baton Ryusoku Flat Hop Up Bucking, Tenergy 9.6v and Matrix 7.4vbatteries... Gallery echo-1-m14-wood-color.jpg 15.2 KB Views: 14 Share: Facebook Twitter Reddit Pinterest Tumblr WhatsApp Email Link