Firearm support devices and related methods

A firearm support device comprising:

• a base structure comprising:
• at least two rails;
• and
• a plurality of rail mounts coupled to and extending from a surface of the base structure, wherein each rail of the at least two rails is coupled to the base structure by at least two rail mounts of the plurality of rail mounts;
• a carriage having a first surface positioned adjacent to the surface of the base structure and a second, opposing surface positioned relatively further away from the surface of the base structure than the first surface, the carriage comprising at least two bearing assemblies coupled to and extending from the second surface of the carriage, the at least two bearing assemblies slidably coupled to the at least two rails of the base structure, each of the at least two bearing assemblies slidably coupled to a rail of the at least two rails to restrict movement of the carriage to a single axis of direction relative to the base structure, wherein the carriage is positioned between the at least two rails and the base structure, and wherein the carriage is further positioned between the at least two bearing assemblies and the base structure;
• an attachment feature coupled to and extending from the second surface of the carriage for mounting at least a portion of a firearm to the carriage, wherein the attachment feature is positioned on the carriage to fix a longitudinal axis of a barrel of a firearm mounted thereto parallel with and between longitudinal axes of each of the at least two rails;
• and
• a biasing feature biasing the carriage in a first position relative to the base structure, the biasing feature coupled to the carriage and to the base assembly;
• a striker assembly for triggering a projectile loaded into a portion of a firearm;
• and
• a striker holder coupled directly to the carriage and configured to cooperatively receive a portion of a housing of the striker assembly within the striker holder and position the striker assembly relative to the attachment feature.