Tokyo Marui / VSR-10 / Spring

I bought this rifle here in Airsoft Bazaar.

The previous owner Made a lot of Upgrades including this "intervention" screw to have access to the Hop up. I was uncertain of this modification, but I use it for more than a year and I think now is a Great Idea. Never I had problems with it. 
You can adjust the hop up very easily in game and it won't move from the position, even in heavy foliage, due to the Spring it has on.
The Precision is crazy. If you can see it you can Hit it. It can do up to 90m with no wind. It has a Generic 1.5x430 Adjustable Scope. 
and four Magazines [Tokyo Maruy]. A 2 Point sling. Body Pouch. 

Bucking 70 Degree  [Action Army] 

Inner tube 6.01 / 430mm [Action Army] (got it at the start of this year).
Cylinder and Aluminum piston 45° for VSR10 [Maple Leaf] (Previous owner)
Reinforced Trigger Stop  [Maple Leaf]  (Previous owner) 
Spring M150 (I think) doing 2.3 J.  (Previous owner)
Spring m110 doing 1.7 J. (Original)
Spring Guide  [Maple Leaf]   (Previous owner) 
I can Dispach by mail or Pick it up in Amsterdam