Elite Force M4 CFR Next-Gen AEG - Black Rail Interface Systems Can possibly fit in the

Can possibly fit in the limited MP5K with some minor modification to the gun (dremel)

Full metal gearbox

Comes in two different adult sizes (Medium / Large) and (XL / XXL)

It is ideal for most airsoft players as it fits carbines and sub-machine guns perfectly

Elite Force M4 CFR Next-Gen AEG - Black Rail Interface Systems Can possibly fit in theElite Force M4 CFR Next Gen AEG Black. High quality polymer body and furniture. The rail system is full metal, along with the top rail over the polymer receiver. Lots of other metal component on this gun. Sights are removable, not flip style, to add a sight if needed. 9. 6v 1600 Nun chuck Battery and smart charger not included. Uses 9. 6v 1600 Nunchuck in rear crane stock. The crane stock is very easy to open up with the newly design release button.