Maximum power for your VSR-10 build
The Action Army M170 spring sits at the top of the VSR-10 upgrade ladder. Designed for the Tokyo Marui VSR-10 and its many clones, it delivers the highest muzzle velocity in the range for dedicated marksman and sniper builds that need to reach out to the very edge of engagement distance.
Consistent at high power
Wound from quality steel in Taiwan, the M170 gives even, repeatable pressure at power levels where cheaper springs go inconsistent. For a precision rifle that translates into tight, predictable groups shot after shot rather than random flyers.
Know your limits before you fit it
As a rough guide the M170 makes around 560+ FPS, though your real figure varies with air seal, inner barrel length, piston and BB weight. This is a very high-power spring that will exceed many UK site limits, so it is essential to chrono after fitting and confirm your rifle meets your site’s FPS or joule cap and minimum engagement distance.
Build it right
A spring this strong demands upgraded internals: a good piston, cylinder head and spring guide are strongly recommended for reliability. Let our in-house techs build it safely with our airsoft upgrade service in Kent, or shop more upgrade parts.
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