VFC MP7 Bolt - NPAS Compatible?

[RabidNinja64]

After an extended research of my gun, which took near enough forever to find the right information, the bolt inside the Umarex/VFC MP7 is completely different compared to KWA. Knowing this, I'm a little more befuddled about what I can do to lower the FPS from 400+ to a CQB safe level of ~350. And considering i'm still abit newish with the internal modification side of guns, I'd like to know what would work best with the internals of my gun. At this point, i'm not even sure if the CQB KWA bolt would fit the VFC system.

VFC Bolt

KWA Bolt

Granted at this point, KWA aftermarket internals should be nulled at this point, but various sources say that "Oh yeah, this is compatible with VFC" and others say the opposite. That being said, I have a few products that i'm unsure about if they'll fit the VFC system:

http://www.wgcshop.com/wgc2008/main/product_detail1.php?search_From=searchItem&item=AZI-VGBB-RFCB&search=searchItem&rs=azimuth&catid=&cat=&view_choice=a

http://www2.wgcshop.com/wgc2008/main/product_detail1.php?search=special&rs=Azimuth&item=AZI-PT-SAHV

http://en.ratech.com.tw/english/index.php?option=com_content&view=article&id=309:rag-ksc-004&catid=45&Itemid=159

http://www.airsoftgi.com/product_info.php?products_id=8933

 

[jcheeseright]

worth having a chat with Ian at milspecsolutions;
http://www.milspecsolutions.co.uk/ra-tech-npas-valve-for-ksc-kwa-mp7-and-system-7-gbb.html

says there some customers have had success using it in the VFC.

 

[RabidNinja64]

*Bump*

Either we put the NPAS kit in wrong, or we got conned; cost me the recoil spring to get it in, just to find out it doesnt fit perfectly and puts the FPS down to 182 and doesnt push the bolt all the way back, even then, you'd think a spring change would be easy....NOWHERE stocks the necessary spring!

Looks like £40 for a complete bolt shipped overseas just to back back to the possible 400 FPS mark -.- all else fails ill swap it out for a KWA MP7

 

[jcheeseright]

why get a KWA when the TM is so much better (it really is!) and shoots at UK CQB power right out of the box?

 

[RabidNinja64]

Either or brand will suit me, as long as it works and is FPS limited; the new bolt is my guns LAST chance to buck up before i stay away from VFC related gas guns, which will suck considering our retailer gave us a small discount for being regulars.

Then again, I dont think anyone is looking for a VFC model; ahwell, noobs intuition!