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

Works will all HW trigger arrangements. Tune Application: NEW PG4 STEEL Tune-Kit fitting HW97 Air Rifles QUAD-4 guides for best stability upon firing! We Highly recommend the installation of our VacSEAL25 or 26 with the new PG4 STEEL for the best damping shot cycle. 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. (12FT/LB) For HW77's smaller compression tube Seal size The redesigned PRO-GUIDE4 STEEL weighted tune kit has a STEEL Body, + 2 Performance: High Output (12FT/LB) Power up to 12ft/lbs Content: (PG4) ProGuide4-STEEL drop-in Kit High Yield valve wire open-end power spring Triple 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. above or below will be approximately .029 difference in velocity, thus foot-pound (Ft/lb, Joules) of shooting energy. (F.A.S.L) For every 1000 ft. 1000 F.A.S.L.x .029 = 29 fps approx Joules= .7475 ft/lb Easy, 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.

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