Patent ID: 6609319
Filing Date: 2003-08-26
Classification: F41A

Abstract:
In a bolt assembly for a firearm comprising:(a) a bolt defined by a proximal end, a distal end terminating in a bolt face surrounded by an integral bolt head and an integral cylindrical portion disposed between said proximal end and said distal end along a longitudinal axis, said bolt head having a plurality of bolt lugs with walls extending integrally and radially outwardly thereof and a firing pin bore concentrically disposed in said bolt along said longitudinal axis, (b) an extractor defined by a proximal end, a distal end and an integral central section comprising a dependent pivot pin receiving lug, (c) a longitudinal opening in said integral cylindrical portion to receive said extractor, (d) a proximal ledge portion within said longitudinal opening, (e) an extractor pivot pin coupling said pivot pin receiving lug into said opening, (f) a pair of right and left springs that bias said extractor distal end toward said bolt face, (g) a firing pin reciprocally carried in said firing pin bore, (h) a cam pin carried in a transverse bore in said integral cylindrical portion and retained therein by said firing pin extending through a transverse bore in said cam pin and (i) a barrel extension defined by a proximal end, a distal end, an integral central portion and a plurality of barrel extension lugs extending integrally and radially inwardly of said barrel extension distal end to operatively engage said bolt lugs, the improvement wherein said proximal ledge portion comprises a right integral lateral lug portion defining a right partial bore that receives said right spring, a left integral lateral lug portion defining a left partial bore that receives said left spring, said right and left partial bores (a) are parallel to each other, (b) comprise proximal and distal vertical ramps and (c) are transversely spaced so they straddle said firing pin bore.