Vortek HW97/HW77 PG4 Steel Tune Kit 12ft/lb

HW97/HW77 PG4 Steel Tune Kit 12ft/lb

Tune Application:NEW PG4 STEEL Tune-Kit fitting HW97 Air RiflesQUAD-4 guides for best stability upon firing! (12FT/LB)For HW77's smaller compression tube Seal sizeThe redesigned PRO-GUIDE4 STEEL weighted tune kit has a STEEL Body, + 2 Performance:High Output (12FT/LB)Power up to 12ft/lbsContent:(PG4) ProGuide4-STEEL drop-in KitHigh Yield valve wire open-end power springTriple guides with Helical Lubrication for damping of metal, plastic, and seals (OPTIONAL: Vortek Vac-SEAL26) Installation:For Consideration when tuning power:It is the owner's responsibility to ensure the legality of their air gun power output. Vortek's Location of testing is 578 Feet.Above.Sea.Level. (F.A.S.L)For every 1000 ft. 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 = 29 fps approxJoules= .7475 ft/lbEasy, do-it-yourself with virtually no pre-load force on assembly. OPTIONAL PISTON SEAL: Special Note for OLDER HW/77 air rifles having smaller compression chambers - your HW77 airgun serial# before 1446049 has a 25mm Compression Tube Bore!! Choose 25mm VacSEAL.We Highly recommend the installation of our VacSEAL25 or 26 with the new PG4 STEEL for the best damping shot cycle. Works will all HW trigger arrangements.OPTIONAL:NOTE for legal limit: Vortek's VacSEAL 25 or 26 piston seal is not required for air rifles to shoot when PG4 is installed.

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