Patent ID: 8006680

Claim:
A paint ball gun barrel indexing 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 position relative to said indexing hole; a cover retaining said plunger within said indexing hole and thereby defining a first limit of travel of said plunger at which said paint ball will pass through said paint ball pathway into said paint ball gun barrel; 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 and at which said paint ball is restricted 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.