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View larger AirsoftPro spring for VSR airsoft sniper rifles with an M145 rating is a reinforced 7mm spring designed to increase the performance and effective range of Tokyo Marui VSR-10 / VSR ONE rifles and their clones such as WELL MB03 and CYMA CM.701. It is made from high-quality spring wire with heat treatment and ground ends for smooth cocking. An excellent choice for a basic rifle upgrade.

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The reinforced AirsoftPro spring for manual VSR-10 platform sniper rifles provides a significant increase in performance and effective range compared to standard springs. It is manufactured from high-quality DIN 17223/C spring wire with heat treatment, helping maintain its elasticity and stable performance even during long-term use. It can be used with both original and upgrade pistons that retain the original dimensions for 7mm springs. It is not compatible with upgrade pistons designed for 9mm springs.
Designed to upgrade manual VSR-10 sniper rifles for higher muzzle velocity and extended effective range.
Manufactured from durable heat-treated spring wire for long service life and stable performance.
Precisely machined ends ensure proper seating and smooth operation of the mechanism.
Designed for Tokyo Marui VSR-10 sniper rifles and compatible replicas using a piston for standard 7mm VSR springs.
The heat-treated material helps maintain the spring's properties even during long-term use.
| Variants | M145 |
| Color | Black |