AirsoftPro is originally known for upgrade parts that were designed and manufactured for the spring-powered A&K SVD. The high-quality and durable parts are mainly manufactured with CNC machines. AirsoftPro is specialized on making strong high-precision upgrade parts.
The M170 spring, which has been manufactured from high-quality mixture (VDSiCr, OTEVA 70 SC), is a powerful and strong upgrade part for sniper rifles that are missing the last straw to maximum power. The diameter of the spring is 9 mm and it works with pistons which have an inner diameter of at least 13 mm. A good upgrade part for your spring-powered rifle!
Inner diameter (the diameter of the spring guide): 9 mm
Length: 257 mm
Diameter of the piston: At least 13 mm
Power: M170 – this spring will likely give over 3 J in an airtight cylinder-hop up-barrel build. If you are looking for less than 3 J (173 m/s) power and you know that your gun is airtight, take a look at M150 springs
Note! The stock parts of most sniper rifles, like VSR-10 and L96, are meant for a smaller, 11 mm wide spring. Thus, this spring is not compatible with the stock piston.