Dave's Custom Airsoft have designed this Butterfly Ambidextrous Charging handle from the ground up to be used with Tokyo Marui Next Gen Recoil Shock M4 and 416 AEGs. 
 
This part is incredibly easy to install, simple remove the front receiver pin, pull the charging handle back slightly, pushing on the forward assist slide your upper receiver off, switch the charging handles over.
Slide the upper receiver in place with 2cm of space at the rear, insert the spacers and push the receiver firmly together again.
Finally, set the receiver pin back into place to lock everything together ready for use.
 
Features
Original Product from Dave's Custom Airsoft
CNC Machined in 6063 Aluminium 
Anodised Black Finish
Ambidextrous butterfly design 
For NGRS M4 / 416 Rifles 
Increased Comfort 
Added Durability 
Smooth Operation 
Easy to Install 
Fantastic Aesthetics