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An accessory mount for a firearm, and a method for installing the accessory mount to the firearm. In combination with the firearm including a longitudinal barrel, a rear support and a front support, the accessory mount includes a first semicylindrical mount housing having two longitudinal edges, an

An accessory mount for a firearm, and a method for installing the accessory mount to the firearm. In combination with the firearm including a longitudinal barrel, a rear support and a front support, the accessory mount includes a first semicylindrical mount housing having two longitudinal edges, an inner surface and a rear end, the first housing positioned along the barrel with its rear end supported by the firearm's rear support, and including longitudinally spaced-apart lugs on the inner surface adjacent to each of the first housing's edges; a second semicylindrical mount housing having two longitudinal edges and a front end, and including longitudinally spaced-apart appendages adjacent to each of the edges of the second housing, the second housing placed to the first housing with the appendages cooperating with the lugs for transversely securing the first housing to the second housing and with the first and second housings longitudinally movable relative to each other; and at least one longitudinally adjustable member carried by one of the housings longitudinally urging the first housing's rear end against the firearm's rear support and longitudinally urging the second housing's front end against the firearm's front support.

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1. An accessory mount for a firearm having a longitudinal barrel, a rear support and a front support, the accessory mount comprising the combination of:a first longitudinal mount housing having a rear end, said first housing positionable along the barrel with said rear end of said first housing supp

1. An accessory mount for a firearm having a longitudinal barrel, a rear support and a front support, the accessory mount comprising the combination of:a first longitudinal mount housing having a rear end, said first housing positionable along the barrel with said rear end of said first housing supported by the rear support;a second longitudinal mount housing having a front end, said second housing positionable along the barrel with said front end of said second housing in the vicinity of said front support;a plurality of inwardly directed longitudinally spaced-apart lugs on one of said first and second housings;a plurality of outwardly directed longitudinally spaced-apart flanges on the other of said first and second housings cooperating with said lugs for transversely securing said first and second housings together when said second housing is placed to said first housing and said first and second housings are longitudinally displaced relative to each other; andat least one adjustable member carried by one of said first and second housings and cooperating with the other of said first and second housings for urging said first and second housings in longitudinally opposite directions. 2. The accessory mount according to claim 1, wherein:said at least one adjustable member urges said first housing longitudinally toward the rear support. 3. The accessory mount according to claim 2, wherein:said at least adjustable member urges said second housing longitudinally toward the front support. 4. The accessory mount according to claim 1, wherein:at least one of said first and second housings includes a rail structure for mounting a firearm accessory thereto. 5. The accessory mount according to claim 1, wherein:one of said first and second housings includes longitudinal channels along said lugs for slidingly containing said flanges of the other of said first and second housings. 6. The accessory mount according to claim 5, wherein:said first housing is longitudinally urged toward the rear support when said first and second housings are longitudinally displaced. 7. The accessory mount according to claim 6, wherein:said second housing is longitudinally urged toward the front support when said first and second housings are longitudinally displaced. 8. The accessory mount according to claim 5, wherein:said rear end of said first housing is longitudinally urged against the rear support when said first and second housings are longitudinally displaced. 9. The accessory mount according to claim 8, wherein:said front end of said second housing is longitudinally urged against said front support when said first and second housings are longitudinally displaced. 10. The accessory mount according to claim 5, wherein:at least one of said first and second housings includes a rail structure for mounting a firearm accessory thereto. 11. An accessory mount for a firearm having a longitudinal barrel, a rear support and a front support, the accessory mount comprising the combination of:a first semicylindrical mount housing having two longitudinal edges, an inner surface and a rear end, said first housing positionable along the barrel with said rear end supported by the rear support, said first housing including longitudinally spaced-apart lugs on said inner surface adjacent to each of said edges;a second semicylindrical mount housing having two longitudinal edges and a front end, said second housing including longitudinally space-apart appendages adjacent to each of said edges of said second housing;said lugs positioned on said first housing and said appendages positioned on said second housing for cooperation between said lugs and said appendages when said second housing is placed to said first housing, for transversely securing said first housing to said second housing with said first housing and said second housing longitudinally movable relative to each other; andat least one longitudinally adjustable member carried by one of said first housing and sai d second housing for urging said first housing and said second housing in longitudinally opposite directions. 12. The accessory mount according to claim 11, wherein:said at least one longitudinally adjustable member urges said rear end of said first housing toward the rear support when said first housing is positioned along the barrel with said rear end of said first housing supported by the rear support and said second housing is transversely secured to said first housing. 13. The accessory mount according to claim 12, wherein:said at least one longitudinally adjustable member urges said front end of said second housing toward the front support. 14. The accessory mount according to claim 11, wherein:at least one of said first housing and said second housing includes a rail structure for mounting a firearm accessory thereto. 15. The accessory mount according to claim 11, wherein:said at least one longitudinally adjustable member is carried by said second housing and cooperates with said first housing during adjustment thereof. 16. The accessory mount according to claim 11, wherein:said first housing includes two longitudinal channels defined by said lugs respectively adjacent said longitudinal edges of said first housing andsaid appendages of said second housing include flanges slidingly contained in said channels when said second housing is laced to said first housing. 17. The accessory mount according to claim 16, wherein:at least one of said first housing and said second housing includes a rail structure for mounting a firearm accessory thereto. 18. Firearm and accessory mount apparatus, comprising in combination:a firearm including a longitudinal barrel, a rear support and a front support;a first semicylindrical mount housing having two longitudinal edges, an inner surface and a rear end, said first housing positioned along said barrel with said rear end supported by said rear support, said first housing including longitudinally space-apart lugs on said inner surface adjacent to each of said edges;a second semicylindrical mount housing having two longitudinal edges and a front end, said second housing including longitudinally spaced-apart appendages adjacent to each of said edges of said second housing, said second housing placed to said first housing with said appendages of said second housing cooperating with said lugs of said first housing for transversely securing said first housing to said second housing with said first housing and second housing longitudinally movable relative to each other; andat least one longitudinally adjustable member carried by one of said first housing and said second housing longitudinally urging said rear end of said first housing against said rear support and longitudinally urging said front end of said second housing against said front support. 19. The apparatus according to claim 18, wherein:at least one of said first housing and said second housing includes a rail structure for mounting a firearm accessory thereto. 20. The apparatus according to claim 18, wherein:said first housing includes two longitudinal channels defined by said lugs respectively adjacent to said longitudinal edges of said first housing; andsaid appendages of said second housing include flanges slidable contained in said channels. 21. The apparatus according to claim 20, wherein:at least one of said first housing and said second housing includes a rail structure for mounting a firearm accessory thereto. 22. A method of installing an accessory mount to firearm, comprising the steps of:providing a firearm having a longitudinal barrel, a rear support and a front support;providing a first semicylindrical mount housing having two longitudinal edges, an inner surface, a rear end, and longitudinally spaced-apart lugs on said inner surface adjacent said longitudinal edges of said first housing, said lugs defining two longitudinal channels therealong;positioning said first housing along said barrel with said rear end supported by said rear support;providing a second semicylindrical mount housing having two longitudinal edges, a front end, and longitudinally spaced-apart appendages adjacent to each of said edges of said second housing, said appendages of said second housing including outwardly transverse flanges;placing said second housing to said first housing with said flanges positioned between said lugs and with said flanges slidingly contained in said channels; andurging said first housing and said second housing in longitudinally opposite directions such that said flanges cooperate with said lugs for transversely securing said first and second housings to each other, said rear end is longitudinally urged against said rear support, and said front end is longitudinally urged against said front support. 23. The method according to claim 22, wherein:during the housing providing steps, at least one of said first and second housings includes a rail structure for mounting a firearm accessory thereto. 24. An accessory mount for a firearm having a longitudinal barrel, a rear support and a front support, the accessory mount comprising the combination of:a first longitudinal mount housing having a rear end, said first housing positionable along the barrel with said rear end of said first housing supported by the rear support;a second longitudinal mount housing having a front end, said second housing positionable along the barrel with said front end of said second housing supported by said front support;longitudinal channels is one of said first and second housings, and longitudinal flangs on the other of said first and second housings slidably received by said channels and transversely securing said first and second housing together; andat least one adjustable member carried by one of said first and second housings and cooperating with the other of said first and second housings for urging said first and second housings in longitudinally opposite directions. 25. The accessory mount according to claim 24, wherein:at least one of said first and second housings includes a rail structure for mounting a firearm accessory thereto. 26. Firearm and accessory mount apparatus, comprising in combination:a firearm including a longitudinal barrel, a rear support and a front support;a first longitudinal mount housing having a rear end, said first housing positioned along said barrel with said rear end of said first housing supported by said rear support;a second longitudinal mount housing having a front end, said second housing positioned along the barrel with said front end of said second housing supported by said front support;longitudinal channels in one of said first and second housings, and longitudinal flanges on the other of said first and second housings slidable received by said channels and transversely securing said first and second housings together; andat least one adjustable member carried by one of said first and second housings and cooperating with the other of said first and second housings for urging said first and second housing in longitudinally opposite directions. 27. The apparatus according to claim 26, wherein:said at least one adjustable member longitudinally urges said rear end of said first housing against said rear support and longitudinally urges said front end of said second housing against said front support. 28. The apparatus according to claim 26, wherein:at least one of said first and second housings includes a rail structure for mounting a firearm accessory thereto.