Magnetic paint ball gun apparatus

A paint ball gun barrel detent pin cooperative with an indexing hole that extends radially through a paint ball gun breech wall and into an axial bore, said axial bore defining at least in part a paint ball pathway through said paint ball gun breech and into a paint ball gun barrel, comprising:

• a plunger passing within said indexing hole and variable in penetration into said axial bore;
• a cover retaining said plunger within said indexing hole and thereby defining a first limit of travel of said plunger having a minimum penetration into said axial bore, said plunger at said first limit and during a firing of said paint ball gun permitting said paint ball to pass through said paint ball pathway into said paint ball gun barrel without fracture;
• a body retaining said plunger within said indexing hole and thereby defining a second limit of travel of said plunger that is distal to said first limit of travel, said plunger at said second limit of travel having a maximum penetration into said axial bore and thereby restricting said paint ball from passing from said breech to said barrel;
• a first magnet coupled to said cover;
• and
• a second magnet coupled to said plunger;
• said first and second magnets repelling said plunger from said cover towards said second limit of travel with a force when said plunger is at said second limit of travel at a minimum and non-linearly increasing from said minimum when said plunger travels from said second limit toward said first limit so as to have less force at said first limit than if said force increased linearly, and to thereby reduce the force required to displace said plunger from said second limit to said first limit.