What are the stock nipple thread dimensions for the Kibler Hawken rifle?The stock nipple thread dimensions for the Kibler Hawken rifle are 1/4 x 28. Category: Product SpecLast verified: 2026-08-02Also called: gun, rifle, muzzleloader, muzzle loader, firearm, hawken, plains rifle, lock, flintlock, firing mechanism, barrel, tube, trigger, set trigger, caplock, percussion, cap gun, twist, rifling twist, twist rate More in Frequently Asked Questions