Lever-action firearm and kit for constructing the same

A firearm, comprising:

• at least one receiver body, wherein the at least one receiver body includes a bolt carrier receiving bore and an accessory mounting flange;
• a bolt carrier slidably disposed within the bolt carrier receiving bore;
• a linkage member having a first end portion and a second end portion, wherein the first end portion is pivotably attached to the bolt carrier, wherein a central portion of the linkage member between the first and second end portions thereof has a hammer-receiving space therein;
• and
• an action-control lever having a first attachment arm and a second attachment arm, wherein a proximate end portion of the first attachment arm is attached to a proximate end portion of the second attachment arm, wherein a distal end portion of the first attachment arm is pivotably attached to the at least one receiver body for enabling the action-control lever to pivot between a battery-ready position and a cartridge-ejecting position, wherein the second attachment arm extends through the accessory mounting flange with the action-control lever in the battery-ready position, and wherein a distal end portion of the second attachment arm is attached to the second end portion of the linkage member.