GHK M4 upgrade parts

[Beeingmyself]

Hello

 

After having tried to seal my GHK M4 nozzle and hopupunit, both standard and still not satisfied about my fps

I an looking af different opportunites

 

Upgraded nozzle spring

http://shop.ehobbyasia.com/ghk-m4-gbb-rifle-nozzle-spring.html#.WNOZAKI1eUn

Can't seem to find the brand name and it doesn't appear on Samoons homepage

and can't find a shop where in stock.

Anybody tried theese and can tell a bit about the result.

 

 

Hopup unit and barel

https://samoon.com.tw/conversion-kit/c-m4/tnt-ghk-m4-kit?limit=100

Seen a few videos with different results so again same question anybody that had good results??

 

 

And last but not least and this is maybe a bit more for the WE users

Titanium Nitride (TiN) coated bolt what is to be expected of this bolt besides smoother cycling and is it worth the money

http://www.evike.com/products/69385/

So far I have only seen this on pre-order on Evike but is there any HK dealer that gonna have these in stock when released?

 

My goal regarding Feet per second are about 405-415 as the field limit here in Denmark is 129,9ms 426fps

I'l be running ASG Ultra air green gas and using 0,28