Fully compatible with the following SpeedQB products:

Stock for standard M4 airsoft spec from 101tech USA

Metal Version 2 Gear box

For the more tactically inclined

Detachable rear sight

Valken 7.4V LiPo 1200mAh 30C Stick canteen pouch Fully compatible with the followingThe Valken 7. 4v 1000mAh Stick Type Lipo airsoft battery is a high performance lithium airsoft gun battery. This Lipo battery has no memory effect, and does not require discharging. This stick Lipo battery can hold a charge for months, and features a small Tamiya plug and XH 3 pin charging connector. They fit inside most buffer tubes and PDW stocks. We recommend our Valken 2 3 Cell Lipo Balancing Charger with this LiPo battery. CANNOT SHIP VIA AIR