TM M4-System S - Metal receiver
 

Would this metal receiver work on a Marui M4 System-S ?

http://www.uncompany.com/images/guarder-ar-33h_big.jpg

No, the S-system upper receiver is specific. I believe you'll either need a regular metal body, plus this: http://www.wgcshop.com/pcart/shopper...m=HE-ACC-M1624
or the S-system specific metal body: http://www.wgcshop.com/pcart/shopper...m=ZK-MB-M16A2E

Hey Mud,

Thought that might help...even though it's been a while.

This is a kit that "Enables installation of metal body for Marui M4 S-System".

http://www.wgcshop.com/pcart/shopper...1624_srch_hurr

Cheers
Panzer