Firearm

Abstract

A firearm comprising an upper receiver, a lower receiver, a bolt guide, and a locking pin. The upper receiver may be selectively couplable to the lower receiver via at least one takedown pin. The at least one takedown pin may be selectively moveable between an engaged position and a disengaged position. In the engaged position the at least one takedown pin may couple the upper receiver to the lower receiver. The bolt guide may be configured to be received by a bore of the upper receiver. The locking pin may be operably disposed between the bolt guide and the at least one takedown pin. The locking pin may be selectively moveable between a locking position and passive position via rotation of the bolt guide.

What is claimed is: 
     
         1 . A firearm comprising:
 an upper receiver and a lower receiver, the upper receiver selectively couplable to the lower receiver via at least one takedown pin, the at least one takedown pin selectively movable between an engaged position and a disengaged position, wherein in the engaged position the at least one takedown pin couples the upper receiver to the lower receiver;   a bolt guide configured to be received by a bore of the upper receiver;   a locking pin operably disposed between the bolt guide and the at least one takedown pin; and   wherein the locking pin is selectively moveable between a locking position and passive position via rotation of the bolt guide, wherein in the locking position the locking pin engages the at least one takedown pin such that the at least one takedown pin is locked in the engaged position, wherein in the passive position the locking pin disengages the at least one takedown pin such that the at least one takedown pin may be selectively moved from the engaged position.   
     
     
         2 . The firearm of  claim 1 , further comprising:
 a bolt assembly configured to be received by the bolt guide, the bolt assembly having a bolt handle extending therefrom; and   wherein the bolt guide includes a slot, the bolt handle of the bolt assembly configured to extend through the slot of the bolt guide when the bolt assembly is received by the bolt guide, and rotation of the bolt handle causes the bolt guide to rotate.   
     
     
         3 . The firearm of  claim 2 , wherein:
 a first end of the locking pin abuts an outer surface of the bolt guide, the bolt guide includes a flat surface defined in the outer surface, in the locking position the locking pin abuts the outer surface of the bolt guide adjacent the flat surface, and in the passive position the locking pin abuts the outer surface of the bolt guide at the flat surface.   
     
     
         4 . The firearm of  claim 3 , wherein:
 a second end of the locking pin abuts a groove defined in an outer surface of the at least one takedown pin.   
     
     
         5 . The firearm of  claim 3 , wherein:
 the bolt handle is selectively moveable between a locked position and an unlocked position, when the bolt handle is in the locked position the locking pin is in the locking position, and when the bolt handle is in the unlocked position the locking pin is in the passive position.   
     
     
         6 . A bolt guide for a bolt action firearm, the bolt guide comprising:
 a substantially cylindrical body having a proximal end and a distal end, the body having a bore defined from the proximal end to the distal end of the body, the bore configured to receive at least a portion of a bolt assembly;   a slot defined in body, the slot extending from the distal end towards the proximal end of the body; and   wherein the bolt guide is configured to be received by an upper receiver of the bolt action firearm such that the distal end of the body of the bolt guide is closer to a barrel of the bolt action firearm than the proximal end of the body of the bolt guide.   
     
     
         7 . The bolt guide of  claim 6 , wherein:
 the slot includes a longitudinal section extending from the distal end of the body and a radial section connected to the longitudinal section.   
     
     
         8 . The bolt guide of  claim 6 , further comprising:
 a flat surface defined in an outer surface of the body, the flat surface located closer to the proximal end than the distal end of the body.   
     
     
         9 . The bolt guide of  claim 6 , wherein:
 the bore of the body is configured to receive the bolt assembly through the distal end, and the slot is configured to receive a bolt handle of the bolt assembly therethrough.   
     
     
         10 . A bolt assembly for a bolt action firearm, the bolt assembly comprising:
 a generally cylindrical bolt tube including:
 a bolt tube body; 
 a notch defined in the bolt tube body at a distal end of the bolt tube; 
 a bolt handle coupled to the bolt tube body and fixed relative thereto; and 
 a bore defined longitudinally through a portion of the bolt tube body at the distal end; 
   a bolt head selectively couplable to the bolt tube, the bolt head including an indexing key configured to be received at least partially by the notch of the bolt tube when the bolt head is coupled to the bolt tube such that rotation of the bolt head relative the bolt tube is resisted, the bolt head further including a groove defined therein;   wherein the bolt tube includes a bolt lock pivotably coupled to the bolt tube, the bolt lock configured to selectively engage the groove of the bolt head; and   wherein the bolt assembly is configured to rotate relative an upper receiver of the bolt action firearm.   
     
     
         11 . The bolt assembly of  claim 10 , wherein:
 the bolt lock is selectively moveable between a closed position and an open position, in the closed position the bolt lock engages the groove of the bolt head such that the bolt head is coupled to the bolt tube, and in the open position the bolt lock disengages the groove of the bolt head such that the bolt head may be decoupled from the bolt tube.   
     
     
         12 . The bolt assembly of  claim 11 , wherein:
 the bolt tube includes a cutout portion configured to receive the bolt lock and a locking notch defined in the bolt tube adjacent the cutout portion; and   the bolt lock includes a ball detent positioned in a side of the bolt lock, the ball detent configured to selectively engage the locking notch of the bolt tube and resist movement of the bolt lock relative the bolt tube.   
     
     
         13 . The bolt assembly of  claim 12 , wherein:
 when the bolt lock is in the closed position, an outer surface of the bolt lock aligns with an outer surface of the bolt tube.   
     
     
         14 . The bolt assembly of  10 , wherein:
 the bolt head includes a distal portion and a proximal portion, the distal portion having a greater diameter than the proximal portion, at least a portion of the proximal portion configured to be received within the bore of the bolt tube.   
     
     
         15 . The bolt assembly of  claim 14 , wherein:
 the indexing key is located on the proximal portion of the bolt head.