Chassis-attached firearm action dust cover

Abstract

A movable firearm breach dust door cover not attached to the receiver or action of a firearm.

1 . An apparatus for selectively covering an ejection port of a firearm action comprising:
 A. a movable dust door cover configured to be installed on a firearm, said firearm comprising:
 I. a receiver, 
 II. an action having an ejection port, and 
 III. a bolt, 
   B. said movable dust door cover configured to selectively cover said ejection port of said firearm wherein:
 I. said movable dust door cover is not attached to said firearm receiver, 
 II. said movable dust door cover is not attached to said firearm action, 
 III. in a closed configuration said movable dust door cover substantially covers said ejection port of firearm action, and 
 IV. in an open configuration said movable dust door cover does not substantially cover said ejection port of said firearm action. 
   
     
     
         2 . The apparatus of  claim 1  wherein said movable dust door cover is configured:
 A. with means for attaching said movable dust door cover indirectly to said firearm. 
 
     
     
         3 . The apparatus of  claim 2  wherein said movable dust door cover is configured to be attached to a plurality of the following:
 A. a stock attached to said firearm, 
 B. a chassis attached to said firearm, or 
 C. means for attaching an accessory to said firearm. 
 
     
     
         4 . The apparatus of  claim 2  wherein said movable dust door cover comprises:
 A. a biasing mechanism configured to bias said movable dust door cover into one of a closed configuration or an open configuration. 
 
     
     
         5 . The apparatus of  claim 4  wherein said movable dust door cover comprises:
 A. said biasing mechanism configured to bias said movable dust door cover into an open configuration. 
 
     
     
         6 . The apparatus of  claim 5  wherein:
 A. said biasing mechanism is a spring. 
 
     
     
         7 . The apparatus of  claim 5  wherein said movable dust door cover further comprises:
 A. engageable movable dust door cover securement features which, when engaged:
 I. overcome said biasing mechanism, and 
 II. are configured to maintain said movable dust door cover in a closed configuration. 
 
 
     
     
         8 . The apparatus of  claim 7  wherein said engageable movable dust door cover securement features further comprise:
 A. a moveable detent:
 I. attached to said movable dust door cover movable from an interfering configuration to a non-interfering configuration, 
 II. configured to interact with an edge of said ejection port of said firearm when in said interfering configuration, 
 
 B. a moveable detent biasing member configured to bias said detent in an interfering configuration, and 
 C. means for preventing said movable detent from detatching from said movable dust door cover. 
 
     
     
         9 . The apparatus of  claim 8  wherein said movable dust door cover further comprises:
 A. bolt activation features configured to displace said movable dust door cover when said bolt of said firearm moves between either of: 
 B. a closed position and an open position or 
 C. an open position and a closed position.