Upgrade set for Snow Wolf Kar98k bolt action sniper rifles. The package include five basic parts to increase performance. Does not require any gun modification.

Aluminum piston:

• Unlike the original plastic, it is made of strong and light aluminum.
• Provides greater durability.
• Six air channels improove sealing.
• The optimal diameter of the sealing o-ring ensures a very good seal and thus a high and stable performance.
• Length: 79mm, outer diameter: 19.8mm, inner diameter: 12mm
• Weight: 19g

Spring guide:

• Made by precision machining of stainless steel.
• Suitable for original SW and upgrade AirsofPro springs

Spring:

• Made of high-quality spring steel with proper heat treatment and ground ends.
• Chemically blackened against corrosion.
• The outer diameter of the spring is about 11.3 mm and has a length of 170 mm.
• Springs are offered in the range from M130 to M140. According to the customer's choice.

Spring guide stopper

• Made of steel with a black finish.
• Ensures maximum durability and, above all, precise axial spring guide seat in the cylinder (the original stopper is off-axis).

Piston sear

• Made of steel with a black finish.