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Question about upgrading km4 RIS

km4 ris lipo spring

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#1 Jesse Hammil

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Posted 03 December 2013 - 07:11 PM

Hi all,

I'm having trouble finding a solid answer on this.  I want to upgrade my km4 RIS.  I'm thinking a 11.1v lipo and a stronger spring.  I'm currently chronoing with .2s at ~370 fps.  I'd like to get it close to 400 without going over.  I'd also like to increase my RoF, hence the lipo. I read that to stay in spec I should get no larger than 15C.  

My Question is is it safe to get a 11.1v 15C lipo and a stronger spring?

Thanks!!

#2 Chuck S

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Posted 04 December 2013 - 03:30 AM

The 11.1v LiPO battery is absolutely safe, the gun is designed for it.  My KM4-CQB run about 1450rpm with this battery.

The KM-Head 6.02mm inner barrel I just installed in my RM4 took the muzzle velocity with 0.20g BBs from about 378fps to 400fps and didn't require cracking the gearbox.  10 minute job.

-- Chuck

#3 Jesse Hammil

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Posted 04 December 2013 - 09:08 AM

Thanks for the info.  Really appreciate it!

#4 Jesse Hammil

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Posted 26 December 2013 - 03:35 PM

Edit. Move this post to another thread that is already open on the same topic. Sorry.

Edited by Jesse Hammil, 26 December 2013 - 03:49 PM.





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