- Paulus Manders is a gunsmith, toolmaker and instrument maker in Christchurch, New Zealand, who specialises in gunsmithing and restoring old and antique firearms, shotguns, rifles, pistols, ammunition and accessories. Manders Precision Engineering manufacture sound moderators, silencers, tube rollers, bottle holders and have a range of engineering and dairy machinery for sale.www.antiqueguns.co.nz