HW80/R1 PG4 DELRIN GLIDE 12ft/lbs-16joule Tune-kit

TUNE APPLICATION:HW80/R1 PG4 DELRIN GLIDE Tune-kit. 12ft/lbs-16 Joules   New Cocking Shoe requiredPower up to 12ft/lbs./16 JoulesPG4 Delrin can be Modified by clipping spring wire to accommodate different velocity per caliber and weight. Product Code: HW80PG4d820125-27Spring Replacement:HW80PG4d820125-27 CONTENTS:PG4 DELRIN MAIN GUIDE+ 2 DELRIN INNER GUIDES+TOPHAT DELRIN GUIDE + 2 THICK-CUT WASHERS to fine tune velocity output. High Yield valve wire power springDamping Lubrication for metal, plastic and seals  Installation:For Consideration when tuning power: It is the owner's responsibility to ensure legality of their air gun power output. Vortek’s Location of testing is 578 Feet Above Sea Level. (F.A.S.L) For every 1000ft above or below will be approximately .029 difference in velocity, thus foot pound (Ft/lb., Joules) of shooting energy. 1000 F.A.S.L. x .029 = 29fps approx.Joules= .7475=ft/lb. Easy, do-it-yourself some pre-load force on assembly. Spring compressor recommended.Wor