Buffer tubes

A buffer tube assembly, comprising:

• a buffer tube for a firearm, comprising:
• a body defining:
• an interior cavity for receiving a buffer spring;
• and
• a rail disposed on and/or formed from the outer surface of the body, the rail comprising:
• one or more pin holes configured to receive a pin of a stock to lock the stock in a position;
• a trunk opening defined at an end of the rail forming a first rail sidewall and second rail sidewall, wherein the first and/or second rail sidewall includes a slot defined therethrough;
• and
• a slide bar channel defined through at least a portion of the rail;
• a slide bar disposed in the slide bar channel to slide therein relative to the one or more pin holes to urge a pin out of a respective pin hole and/or to block a pin from being received by the pin holes in an actuated position, and to allow a pin to enter the one or more pin holes in an unactuated position;
• and
• an actuator connected to the slide bar to pull the slide bar, comprising:
• a trunk slidably disposed within the trunk opening in the rail between the first and second rail sidewalls;
• and
• a slide pin extending laterally from the trunk of the actuator and configured to be inserted into the slot to engage the slot to linearly guide the actuator.