Gas Spring Tune Kits

   THE TACTICAL ADVANTAGE:
     
   Internal Lubrication-NO lube required
Glides on Two Thick Teflon Bearings no Metal-to-Metal
Eazy, Customer Adj. Velocity FT/LB.-Joules
Shoot Further-Flatter trajectory
Enhanced Slug velocity
 More power with less Cocking Effort!
Very lite recoil! Stays on target!
Minimal shot noise 
Adjustable Settings (filling valve included)
Vortek Moly Filled Piston Seal
***FACTORY TIME TESTED VELOCITIES:
Below we recorded factory velocities at our location (68 deg.) having 985 F.A.S.L (atmosphere pressure) across a Pro-Crony DLX unit 1 foot from muzzle. Depending on location of use, and several features of each air rifle, power output will vary compared to below. Each gun velocity is relevant in comparison at time of crony:

STOCK OEM GAMO MAGNUM.25 caliber
H&N FTT 20.06g          790fps=27.7ft/lbs. 37j 
Gamo 21.80g                735fps=26.0ft/lbs. 35j
JSB Greens 16.54g        860fps=27.0ft/lbs. 36.5j
Gamo Platinum 14.4g   940fps=28.0ft/lbs. 39j 
~VORTEK KINETIC PISTON INSTALLED~
MAXIMUM FILLED PSI/BAR186 (.25 CALIBER)
HN FTT 20.06g               865fps=33.00ft/lbs. 44.j
Gamo 21.80g                  800fps=32.50ft/lbs. 42j
JSB Greens 16.54g         970fps=35.00ft/lbs. 48J
Gamo Platinum 14.4g   1060fps=36.00ft/lbs. 49j

STOCK OEM GAMO FUSION Air Rifle .22. 
Crosman   14.33gr.       810fps=21   Ft/lbs. 30.j
JSB Jumbo 18.1gr.       700fps=19.7 Ft/lbs. 28.j
Slugs 17.50gr.               700fps=19   Ft/lbs. 27.6j
~VORTEK KINETIC PISTON INSTALLED~
MAXIMUM FILLED PSI/BAR180 (.22 CALIBER) 
Crosman 14.33gr.            885fps=25.0ft/lbs. 33.0j
JSB Hades 15.9gr.            835fps=24.6ft/lbs. 33.2j
JSB Jumbo 18.1gr.           775fps=24.1ft/lbs. 32.5j
JSB GTO 11.75gr.           1000fps=26.2ft/lbs. 35.0j 
Slugs 17.50gr.                  780fps=23.5 ft/lbs. 31.7j

~VORTEK KINETIC PISTON INSTALLED~
MAXIMUM FILLED PSI/BAR180 (.17 CALIBER)
Crosman 7.90gr.             1000fps=17.5ft/lbs. 23.6j
H&N 8.64gr.                     975fps=18.3ft/lbs. 24.7j
Hades 10.36gr.                 880fps=17.8ft/lbs. 24.0j
AA FT 10.35gr.                 875fps=17.6ft/lbs.  23.7j
JSB slugs 10.03gr.            840fps=15.7ft/lbs.  21.2j
Gamo Green 5.71gr.       1260fps=20.1 ft/lbs. 27.0j

Call us first, we welcome all Questions. 
Land Line: 734-648-0620 or Cell 517-428-1306 or Email
No shipments of this product out-side USA.
(Spring Compressor Required when installing)
If you are uncertain how too or never worked on an air rifle be aware they are potentially dangerous due to a Hi-preload of spring tension. Pend. Pat.