Firearm Receiver Cover and Closure Assembly

Abstract

A firearm receiver cover and closure assembly that allows the cover to be moved between respective open and closed positions relative to an underlying receiver. The closure assembly includes a latch that defines a latch button that cooperates with a latch button opening formed in the cover. Cooperation of the latch with the receiver and the cooperation of the latch button with the latch opening formed in the cover provide fixed and repeatable vertical and lateral positioning of the cover relative to the underlying receiver, without adjustment or operation of a centering mechanism or structure, during each closing of the cover relative to the underlying receiver.

What is claimed is: 
     
         1 . A firearm cover assembly comprising:
 a cover constructed to extend along an upper portion of an underlying receiver, the cover being pivotably connected to an underlying firearm so that the cover is pivotable about a forward oriented pivot axis;   an opening formed in a rearward oriented portion of the cover;   a latch configured to selectively engage the cover;   a trunnion block securable to the underlying receiver and constructed to engage the latch so that the latch is slideable relative to the trunnion block in a direction that is transverse to the forward oriented pivot axis; and   a button defined by the latch and shaped to slideably cooperate with the opening formed in the cover so that the cover can rotate about the forward oriented pivot axis in a direction away from the underlying receiver when the button is disengaged from the opening and so that engagement of the button defined by the latch with the opening formed in the cover defines a fixed non-adjustable lateral position and a fixed inclination of the cover relative to the underlying receiver.   
     
     
         2 . The firearm cover assembly of  claim 1  further comprising an accessory rail formed along at least a portion of the cover between the forward oriented pivot axis and the opening forming the rearward oriented portion of the cover. 
     
     
         3 . The firearm cover assembly of  claim 2  wherein the accessory rail is further defined as a picatinny rail. 
     
     
         4 . The firearm cover assembly of  claim 1  wherein the trunnion block includes a tang that extends in a rearward direction and is constructed to secure a stock relative to the underlying receiver. 
     
     
         5 . The firearm cover assembly of  claim 1  further comprising a recoil wire secured to a forward facing portion of the latch and passing through a passage defined by a bolt carrier slideably associated with the underlying receiver. 
     
     
         6 . The firearm cover assembly of  claim 1  wherein the button and the opening formed in the cover each have respective tapered shapes whose respective cross-sectional shape volumes reduce as the respective button and opening extend in a rearward direction. 
     
     
         7 . The firearm cover assembly of  claim 1  further comprising a horizontal gap formed between the opening and the button when the button is fully engaged with the opening. 
     
     
         8 . The firearm cover assembly of  claim 1  further comprising another horizontal gap formed between the opening and the button when the button is fully engaged and the opening and wherein the horizontal gap and another horizontal gap are disposed along a respective upper surface and a lower surface of the button when the button is engaged with the opening.