TP0903 Mainspring - For Model 1842 Musket

High quality replacements for early military muskets. Most will readily fit the locks for which they are listed; some hand fitting occasionally required. Have been flex tested which usually shows defects in the steel or heat treating. Mishandling in the installation of these springs voids the guarantee, which will only be valid if there is a visible imperfection in broke edges. Install ONLY with a mainspring vise.