Receiver cover and accessory rail

1. A cover for a receiver of a gun comprising:

an elongated member having a first longitudinal axis, the elongated member comprising

a distal end portion which comprises;

a leading edge which is configured and dimensioned to connect with a gun part; and

a proximal end portion which is spaced from the distal end portion along the first longitudinal axis, and which comprises

a proximal end wall,

a proximal rim adjacent the proximal end wall,

a first locking mechanism adjacent the proximal end wall which comprises

an anchor, and

a positioning member connected to the anchor such that movement of the positioning member moves the anchor with respect to the proximal rim, and

a blocking member operatively associated with the positioning member

the first locking mechanism comprising first and second operable configurations such that in the first configuration the blocking member arrests movement of the positioning member and in the second configuration the blocking member allows movement of the positioning member.

2. The cover of claim 1 , wherein the positioning member is movable with respect to the anchor.

3. The cover of claim 2 , wherein the positioning member is rotatable with respect to the anchor.

4. The cover of claim 3 , wherein the positioning member and the anchor are connected by mating screw threads.

5. The cover of claim 3 , wherein rotation of the positioning member in one direction moves the anchor away from the proximal rim.

6. The cover of claim 5 , wherein counter rotation of the positioning member moves the anchor toward the proximal rim.

7. The cover of claim 1 , wherein the anchor comprises

a body which comprises

a first surface,

a second surface spaced from the first surface, and

a passage extending from the first surface toward the second surface, the passage comprising a first side wall.

8. The cover of claim 7 , wherein the first side wall is situated between the proximal rim and the blocking member.

9. The cover of claim 8 , wherein the first side wall is positioned to anchor against a recoil spring guide of a gun.

10. The cover of claim 9 , wherein the passage extends from the first surface to the second surface.

11. The cover of claim 1 , wherein the positioning member comprises a shaft that is connected to the anchor.

12. The cover of claim 11 , wherein the positioning member further comprises a knob connected to the shaft such that moving the knob regulates the position of the anchor with respect to the proximal rim.

13. The cover of claim 12 , wherein the knob comprises a first exterior surface, and the first exterior surface comprises a plurality of recesses, the plurality of recesses being selectively positionable opposite the blocking member.

14. The cover of claim 13 , wherein each of the plurality of recesses are configured and dimensioned to engage the blocking member to fix the position of the knob.

15. The cover of claim 14 , wherein the blocking member comprises a smooth ball spring plunger.

16. The cover of claim 11 , wherein the shaft comprises a second longitudinal axis and the knob is rotatable about the second longitudinal axis.

17. The cover of claim 16 , wherein the knob is fixed to the shaft.

18. The cover of claim 1 , further comprising a second locking mechanism adjacent the distal end portion which comprises

a lever which comprises a distal end and a proximal end, the distal end of the lever being positioned adjacent the leading edge, and

a biasing member positioned between the elongated member and the lever,

the second locking mechanism comprising third and fourth configurations such that in the third configuration the distal end of the lever is biased toward the leading edge, and such that in the fourth configuration the proximal end of the lever compresses the biasing member.

19. The cover of claim 1 , wherein the elongated member comprises a tactical accessory rail.

20. The cover of claim 1 , wherein the elongated member is configured and dimensioned to form a cover for a receiver of an AK-47 variant rifle.