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Diana 350-PG4 STEEL SHO Tune-Kit (VTK-MA-004)

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Another level of power performance. Our ***New, Redesigned PRO-GUIDE4s STEEL weighted tune kit !   As docil, Easyier to engage with more fire-power then OEMs new gas piston design air-rifle!
A THICKER, heavier machined Steel outer-guide that brings beam strength IN-LINE quickly dampening shot harmonics with 3 synthetic internal damping guides.  One machined (1) slip fitted helical washer holding true center griping onto internal (2)spring guide, and 1 pc  (3) HELICAL Top-Hat onto a high-yield, open-coil spring wire. This design allows use of both end coils for more accurate power output across same product line. As well as providing the user an easier cocking effort at full power output!  This kit eingineered for all calibers small and large, old and new Diana trigger arrangement. Will not over shoot older warn tolerance of compression tube. We also offer custom mfg spring coil count, more or less power output at no addition cost. ~Very quick, liner firing movement consistent deviations shot after shot. Safe LOAD-EZ STEEL installation!

 Also fits Ruger air magnum

1200+fps(.17cal)365 m/s CP7.9g
Long Range flat shooting .22 caliber ballastics!
1150 fps (22 cal) 362m/s 9.56g (tin pellet) n=28FT/LB SHO

Product Code: 

Respectfully, velocities taking after 3 day break-in installed using Vortek ProSEAL28

  • (PG4sProGuide4-STEEL drop-in Kit
  • High Yield valve wire open-end power spring
  • Triple guides with Helical 
  • Lubrication for damping of metal, plastic and seals