Scorpion Piston - VSR10 + Spring Guide

The New Stalker Scorpion Piston Kit for the VSR10!

Key Features :

• Weight adjustable modular piston (from ~65 to 148 grams)
• Silences your VSR10
• Increases joule/fps consistency
• Adjustable air brakes with double O-ring cutouts for optimal fine-tuning
• Option to short stroke your VSR10 for quicker reloads (at the cost of some joules)
• Comes with 3mm Green Anti Shock/bumper Pad 40D to avoid slam sound of your piston on the VSR head (This pad needs to be glued with good instant glue)
• Different Hardness and sizes Anti Shock/bumper pads are available (Check Related products)

The piston is optimally designed to work with 9MM Springs and the Stalker Spring Guide.

The piston has 2x 3.80mm adjustable air brakes included for optimal fine-tuning depending on your setup.

• 1x 3.80mm Short Air Brake (Optimal for 2j and 3J~ Builds or higher).
• 1x 3.80mm Long Air Brake (Optimal for 2J~ Builds or lower).
  
  Airbrake <> Cylinder Head Chart
  
  
• Action Army Cylinder Head = 3.80mm Airbrake
  
• TM Cylinder Head = 3.80mm Airbrake
  
• Laylax Cylinder Head = 3.80mm Airbrake
  
• SSG-10 Cylinder Head = 4.40mm Airbrake
• Other Cylinder Heads = measure your nozzle inner diameter and select optimal air brake

3.80MM Airbrake For Scorpion pistons Article Code: ST-102
4.00MM Airbrake For Scorpion pistons Article Code: ST-101
4.40MM Airbrake For Scorpion pistons Article Code: ST-103

The new designed piston comes with a slightly modified piston cup to give optimal results in the VSR10 cylinders. This cup will work from 1J up to 4J+.

Golden Rules of installation

• Always put a drop of Silicon oil or oil on your cup edge to achieve optimal joules.
• For 2.3j setups we recommend starting with the short air brake and unscrewing it completely.
  
• For 2.8+ setups we recommend starting with the short air brake and screw it in completely.
• Always set your hopup correctly on desired BB Weight and adjust to shoot straight.
• Higher the Joule = Shorter the Air brake
• Lower the Joule = Longer the Air brake.
• Choose your Air brake and start low, then higher (Unscrew) it each time until the setup is silent.
• When you start to lose joules then you know you are just over the perfect position of the air brake you have to screw the brake back in a bit, gain joules back, and have the most silent setup.

Good setups need adjustable air brakes because too many parts in your rifle can change the acceleration speed of the piston. BB Weight, Spring Power,  Bucking Hardness, Barrel Length, Weight of the piston etc. We also recommend buying some spring guide spacers to play with the weight of the piston and joules of the spring.

Included in this kit :

• 1x Stalker Scorpion 9MM Spring Guide (With Engraved Stalker Logo)
• 1x 3mm Green Anti Shock Pad 40D (Cylinder head Not included)
• 1x Piston cup
• 1x Aluminum piston head
• 1x Stainless steel piston head
• 5x Aluminum weights
• 4x Stainless steel weights
• Sear end cap made of stainless steel (15gram)
• 2 Adjustable Air Brakes (Long & Short) 3.80mm
• 1x Nut to lock the Air Brake setting
• 10- O rings for in between the weights or cylinder head to keep the piston like one solid piece.
• 2x Front and Back guide rings made of POM for VSR10 Cylinder specifications)

In depth information :

The Scorpion piston is a unique concept where 6 weights form the body itself and as the piston itself is made up of these weights, it is also possible to extend the piston with additional weights (short stroke) which in turn reduces the volume of your cylinder and joule output but makes loading your VSR10 a lot shorter by each weight you add at the cost of some joule output which can be compensated with a stronger spring. 

The piston comes with 9 body weights that are interchangeable with each other to perfectly set up your VSR10.

• 5x Aluminum anodized black body weights, each piece weighs: 3 Grams
• 4x Stainless steel polished body weights, each piece weighs: 11 Grams

Next to that, the piston comes with 2 head weight versions as well.

• 1x Aluminum anodized black head that weighs: 7 Grams
• 1x Stainless steel polished steel head that weighs: 17 Grams

The list for the 6 piece setups:
(The 5th stainless steel mid-section weight is for sale separate if u want to use the full heavy weight gold setups)

• VSR Scorpion 43g (1x head alu, 5x mid-section alu)
• VSR Scorpion 50g (1x head alu, 1x mid-section steel , 4x mid-section alu)
• VSR Scorpion 54g (1x head steel, 5x mid-section alu)
• VSR Scorpion 58g (1x head alu, 2x mid-section steel , 3x mid-section alu)
• VSR Scorpion 61g (1x head steel, 1x mid-section steel , 4x mid-section alu)
• VSR Scorpion 65g (1x head alu, 3x mid-section steel , 2x mid-section alu)
• VSR Scorpion 68g (1x head steel, 2x mid-section steel , 3x mid-section alu)
• VSR Scorpion 72g (1x head alu, 4x mid-section steel , 1x mid-section alu)
• VSR Scorpion 76g (1x head steel, 3x mid-section steel , 2x mid-section alu)
• VSR Scorpion 79g (1x head alu, 5x mid-section steel)
  This setup needs a 5th stainless steel mid-section, which is for sale separate.
• VSR Scorpion 82g (1x head steel, 4x mid-section steel , 1x mid-section alu)
• VSR Scorpion 90g (1x head steel, 5x mid-section steel)
  This setup needs a 5th stainless steel mid-section, which is for sale separate.

The air brakes are held with a nut underneath the cup against the piston head to keep it in place after you have adjusted it to your liking. The adjustable air brake is there to adjust the piston’s speed at the very end of its movement to reduce the time of air escaping the cylinder and to reduces piston impact noise when it hits the cylinder head, a sorbo or our own Anti shock pad thats included in this kit can be glued on your cylinder head can still be used with this piston to reduce the impact sound of the piston even more!

Basically, if you like a plug and play piston or if you are a master of tinkering with your piston weights, air brakes to get the best performance, then the Stalker Scorpion is your best friend.

If you have any issues or questions about this or other Stalker Products, please visit our Stalker Owners Group on Facebook here:

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