Receiver system for a bolt action firearm

Abstract

Receiver system for a bolt action firearm, comprising:a receiver comprising a forward end adapted to receive a barrel and a rearward end arranged to receive a breech bolt in a boltway provided in said receiver;a breech bolt adapted to slide linearly in said boltway and to lock to said receiver by rotation when said breech bolt is in a closed position;a buttstock interface block attached at a rearward end of said receiver and adapted to interface with said stock;a trigger mechanism provided in said buttstock interface block and arranged to cooperate with a cocking piece 31 carried by a striker provided in said breech bolt.

1 - 12 . (canceled) 
     
     
         13 . Receiver system for a bolt action firearm, comprising:
 a receiver comprising a forward end adapted to receive a barrel and a rearward end arranged to receive a breech bolt in a boltway provided in said receiver;   a breech bolt adapted to slide linearly in said boltway and to lock to said receiver by rotation when said breech bolt is in a closed position;   a buttstock interface block attached at a rearward end of said receiver and adapted to interface with said stock;   a trigger mechanism provided in said buttstock interface block and arranged to cooperate with a cocking piece carried by a striker provided in said breech bolt.   
     
     
         14 . Receiver system according to  claim 13 , wherein said trigger mechanism is arranged to retain said cocking piece and said striker in a cocked position by means of a sear and to release it in response to a predetermined pressure on a trigger. 
     
     
         15 . Receiver system according to  claim 13 , wherein said receiver comprises at least one rail on a lower side thereof, said rail being adapted to interface with said buttstock interface block. 
     
     
         16 . Receiver system according to  claim 13 , wherein said buttstock interface block is fixed to said receiver by means of at least one fixing bolt. 
     
     
         17 . Receiver system according to  claim 13 , wherein said receiver comprises a locking shoulder situated rearward of said boltway. 
     
     
         18 . Receiver system according to  claim 17 , wherein said breech bolt comprises at least one locking surface adapted to interact with said locking shoulder, said locking surface being adjacent to a bevelled surface arranged to cooperate with said locking shoulder so as to provide a mechanical advantage when rotating said breech bolt towards a locked position. 
     
     
         19 . Receiver system according to  claim 18 , wherein said breech bolt comprises a first primary extraction cam arranged to interact with a second primary extraction cam provided on a rearward-facing surface of said receiver when said bolt is turned towards its fully unlocked position. 
     
     
         20 . Receiver system according to  claim 18 , wherein said breech bolt comprises two locking surfaces arranged symmetrically such that by rotating said breech bolt in a first direction about its longitudinal axis a first of said locking surfaces can be brought into engagement with said locking shoulder, and by rotating said breech bolt in a second direction opposite to said first direction about its longitudinal axis a second of said locking surfaces can be brought into engagement with said locking shoulder. 
     
     
         21 . Receiver system according to  claim 18 , wherein said breech bolt and said locking shoulder are adapted so as to define:
 an unlocked position in which said at least one locking surface is clear of said locking shoulder;   a locked position in which a locking surface is in contact with said locking shoulder and in which said cocking piece is free to travel forwards to its fullest extent; and   a safety position between said unlocked position and said locked position in which a locking surface is in contact with said locking shoulder and in which said cocking piece is prevented from traveling forwards to its fullest extent.   
     
     
         22 . Receiver system according to  claim 21 , further comprising a detent system adapted to maintain said breech bolt in each of said positions. 
     
     
         23 . Receiver system according to  claim 22 , wherein said detent system comprises a spring-loaded plunger mounted in at least one of said receiver and said buttstock interface block, said plunger being arranged to cooperate with a plurality of detent surfaces and/or notches provided on said breech bolt. 
     
     
         24 . Firearm comprising:
 a receiver system according to  claim 13 ;   a barrel fixed to said forward end of said receiver; and   a buttstock interfacing with or integral with said buttstock interface block.