The IV Core bolt assembly is now available as a retro-fit upgrade for all GEO marker models. These Mazens' IV Core kits ship with the IV Core stem and the ST2.5 bolt (integrated soft tip for optimal paint handling without the swelling of previous soft tip bolts).
Compatibility: GEO, GEO+, SL91, GEO2, GEO2.1, GEO3 and GEO3.1