Firearm loader

A method, comprising:

• positioning a firearm loader on a firearm, the firearm loader comprising a body defining a cavity with a first open end and a slot communicating with the cavity, outwardly turned lips defined in the body on edges of the slot, and an interface arm extending from the body;
• and
• transferring cartridges positioned in the cavity through a magazine opening of the firearm by engaging the cartridges through the slot proximate the outwardly turn lips and pushing the cartridges through the first open end, wherein:
• positioning the firearm loader on the firearm comprises positioning the interface arm on a trigger guard of the firearm to align the first open end with the magazine opening.

An apparatus, comprising:

• a firearm comprising:
• a magazine opening;
• and
• a trigger guard having a lateral offset with respect to the magazine opening;
• and
• a firearm loader comprising:
• a body defining a cavity with a first open end and a slot communicating with the cavity;
• outwardly turned lips defined in the body on edges of the slot;
• and
• an interface arm extending from the body, wherein:
• the arm has a shape corresponding to the trigger guard and extends from the body in a location corresponding to the lateral offset between the magazine opening and the trigger guard.

A firearm loader, comprising:

• a body defining a cavity with a first open end and a slot communicating with the cavity;
• a magazine lip defined in the body and extending from the first open end;
• and
• an interface arm extending from the body.

A firearm loader, comprising:

• a body defining a cavity with a first open end and a slot communicating with the cavity;
• an interface arm extending from the body;
• and
• a lip extending from an end of the interface arm, wherein:
• the interface arm has a first curvature in a first direction;
• and
• the lip has a second curvature in a second direction opposite to the first direction.

A firearm loader, comprising:

• a body defining a cavity with a first open end and a slot communicating with the cavity;
• and
• an interface arm extending from the body, wherein:
• the body has an oval cross-section having a first diameter in a first direction greater than a second diameter in a second direction different than the first direction.