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 a BRAND NEW 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