Firearm accessory mounting interface

A firearm accessory mounting interface comprising:

• a first fastener having a proximal end and a distal end, the first fastener configured to pass through a firearm accessory and a slot in a firearm;
• and
• a second fastener having a lug and a locking portion, the second fastener configured to mate to the first fastener so as to draw the first and second fasteners together along a first axis and about one or more of the firearm accessory and the firearm, the lug and the locking portion shaped to fit through the slot in the firearm when the second fastener is parallel to a second axis passing through the slot, wherein when the second fastener is oblique to the second axis, the lug cannot pass through the slot;
• the locking portion, in a closed position, is configured to prevent the second fastener from rotating beyond the closed position.

A firearm accessory mounting interface comprising:

• a first fastener having a first end and a second end opposing the first end, the first fastener shaped to pass through a firearm accessory and at least a portion of the firearm wall;
• and
• a second fastener having a lug and a locking portion extending from the lug, the second fastener configured to mate with one of the first end and the second end of the first fastener so as to squeeze the firearm accessory and the firearm between at least one surface of the lug and another end of the first fastener, the lug and the locking portion shaped to fit through the at least the portion of the firearm wall based at least in part on an angle between the second fastener and an axis of the slot;
• the locking portion, in a closed position, is configured to prevent the second fastener from rotating beyond the closed position.