Lockable firearm safety device

A safety device to prevent use of a longarm having a receiver defining first and second ports connected by an internal cavity containing a breech block displaceable from a fire position. the device comprising:

• a one piece, rigid, elongated body curved along a longitudinal axis and having a first end defining an aperture and a longitudinally opposed second end, the first end and body having a width smaller than the ports and the internal cavity and the second end having opposing arms, each arm extending from a body side edge to define a fixed T shape, the arms having a width greater than the first port and the internal cavity;
• and
• a locking device separable from the body and securable to the first end aperture but free of the second end when secured to the first end aperture, wherein the locking device is a padlock comprising a shackle;
• wherein the first end and body are disposable in an insertion direction through the first longarm port, into the internal cavity and out of the other port so that the breech block is displaced from the fire position, the opposing arms remaining external to the first port and preventing movement of the safety device through the longarm receiver in the insertion direction and the secured locking device adjacent the second port and preventing removal of the safety device through the longarm receiver.

A method of securing a firearm from unauthorized use, comprising:

• providing a firearm having a firearm receiver, the firearm receiver defining a longitudinal axis, a first port and a second port, the second port radially arranged around the firearm longitudinal axis from the first port, the first and second ports connected by an internal cavity, the internal cavity containing a breech block displaceable from a fire position to a load position;
• providing a locking bar comprising an elongated body defining a curved longitudinal axis and having a first end defining an aperture and a longitudinally opposed second end, the first end and body having a small width, the second end having opposing arms, each arm extending from a body side edge in a direction orthogonal to the body to define a T shape, the arms having a width greater than the small width;
• moving the breech block away from the fire position toward the load position;
• moving the locking bar first end in an insertion direction through the first port into the internal cavity and out of the second port, wherein the locking bar second end remains external to the firearm receiver and adjacent the first port;
• and
• securing a locking device to the locking bar first end aperture adjacent to the second port and external to the firearm receiver;
• wherein the locking bar arm width prevents movement of the locking bar second end through the receiver in the insertion direction and the locking device prevents movement of the locking bar first end through the receiver in a removal direction.