Maruzen MP5K Mods to make it more durable
 

Also Im going to get the Maruzen MP5KA4 Gbb. I've heard that with slight modifications it can handle green gas but I'm not been able to find any info from searching.

I only turned up a hi flow valve for it;

http://redwolfairsoft.com/redwolf/ai...l?prodID=20183

Are there any mods sold off the shelf? Or must I DIY? Thanks for any help!