Madbull Airsoft ACE Licensed Stock Tube for M4 MB BT ACE

New way to play Airsoft: Put your battery into buttstock! Use high performance stock-fit LiPO battery to power up your AEG. MadBull's ACE M4 stock tube is designed for MadBull PX-04, SOCOMGEAR AEG-07, and KA's stock-fit LiPObatteries. MadBull's stock tube has the following features: Made of T6 Aluminum, Like real rifle (Most of other Airsoft brands are using cheap alloy) Lightest weight in the market 3oz only, compared to other alloy made tube (>6oz) Anodized anti-scratch finish. (Other brands can only paint it because of the ally material.) QD end cap for fast battery changing. Other brands are still using old school methods. Extra slot for easy wiring 25.99mm inner diameter for stock-fit LiPO batteries