Willyg1981

Hello everyone , 

     I’m working on my stoner mk63 after initially getting it running very well 380fps ( french field limits) ....

it’s now developed a problem ,..huge loss of FPS ,..I discovered the new double o ring piston head had somehow tipped and caused it to scratch unported brass cylinder ,... 

fast forward to now ,.. new stainless unported cylinder , new double o ring piston head , new double o ring Air nozzle and new spring m135 , 

it’s still no better ?‍
 

I must of taken it apart 10-15 times now , it’s becoming a real pain in the ass.

I’m using guarder teflon grease on piston head and abbey silicon oil on o rings 

abbey black grease on grease ( using a small painting brush to apply the grease) to these parts so not overkill at all ) 
 

Any ideas ????? 

Evening everyone,

   Ok so what with this lockdown Iv been doing a fair bit of work on my g28 , it’s not stock 

list of upgrades so far ,

retro arms box 
m140 spring

highly polished unported brass CYMA cylinder 

aluminium double o ring nozzle

Prometheus night torque gears 18:1

infinty cnc 18000 high torque motor

full metal rack pistol (AOE’d) 
sorbo pad 

hollow Piston o ring  

shimmed 

Heavy duty bushes 

Orga wide bore barrel 
r hopped 

promy purple flat hopped 

and a tru hop concave hard plastic nub that has been filled with sugru and the shaved to create and nice flat nub with a tiny bit of give 

using 11.1 v it Gives a good 75-80m straight shot 

but since Iv fitted the flat hop im

getting 1 full distance shot and then 1 short and then 1 full and so on and so on ,

it’s bizarre , I’m just wondering if anyone else has had this happen and what was the cause ? 
thank you ? 

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