Firearm barrel lock

A firearm safety lock assembly for use with a firearm having a barrel disposed between a breech and a muzzle, comprising:

• a cable having opposed first and second ends;
• a chamber insert sized to fit within a breech of a firearm, said chamber insert having a longitudinal axis, and said first end of said cable secured to said chamber insert on said longitudinal axis;
• a rigid locking rod including at least one circumferential groove fixed at said second end of said cable;
• a muzzle insert having a cylindrical body sized to partially seat within a firearm muzzle opposite said chamber insert, said muzzle insert including an axial bore configured to receive said rigid locking rod;
• a first circumferential flange on said cylindrical body with an external diameter greater than an internal diameter of said firearm muzzle, and a second circumferential flange spaced from said first circumferential flange on said cylindrical body with an external diameter greater than an internal diameter of said firearm muzzle, said first and second circumferential flanges defining a circumferential channel there between;
• at least one bore disposed within said cylindrical body, said at least one bore linking said axial bore and said circumferential channel;
• a displaceable lock pin disposed within each of said at least one bore, said lock pin displaceable between a locked position partially disposed within said axial bore and an unlocked position partially disposed within said circumferential channel;
• wherein said circumferential channel is configured to seat a lock element armature to displace said lock pin from said unlocked position to said locked position;
• and
• wherein said displaceable lock pin is configured to engage said at least one circumferential groove of said rigid locking rod within said axial bore in said locked position, securing said rigid locking rod in swiveling engagement with said muzzle insert such that said cable is secured through the firearm barrel between said chamber insert and said muzzle insert.

A method for utilizing a firearm safety lock including a flexible tension member having opposed first and second ends, a chamber insert sized to fit within a breech of a firearm secured to said first end of said tension member by a swivel;

• a locking rod including at least one circumferential groove secured to said second end of said flexible tension member;
• a muzzle insert having a first portion sized to seat within a muzzle of a firearm barrel opposite said chamber insert, a second portion sized to extend beyond said firearm muzzle, said second portion having an external diameter greater than an internal diameter of said firearm muzzle, said muzzle insert further including an axial bore, and at least one lock element disposable within said axial bore;
• comprising:
• inserting said locking rod and said flexible tension member into said firearm barrel though said firearm breech;
• seating said chamber insert within said firearm breech;
• drawing said flexible tension member through said firearm barrel such that a portion of said locking rod protrudes beyond said firearm muzzle;
• passing said protruding portion of said locking rod through said axial bore of said muzzle insert, such that said first portion of said muzzle insert seats within said firearm muzzle;
• exerting force on said rigid cylindrical locking rod to draw said flexible tension member through said firearm barrel and said seated firearm muzzle insert, such that said at least one circumferential groove in said locking rod is disposed within said second portion of said muzzle insert;
• and
• securing said lock element within said axial bore to engage said circumferential groove, thereby securing said flexible tension member in swivel engagement between said chamber insert and said muzzle insert.

A lock assembly for use with a firearm safety locking kit having a chamber insert sized to fit within a breech of a firearm, a first end of a flexible member secured to said chamber insert on a longitudinal axis and extending through a barrel of the firearm, comprising:

• a rigid locking rod, said rigid locking rod including at least one circumferential groove;
• an insert including:
• a first circumferential flange and a second circumferential flange, said first circumferential flange and said second circumferential flange defining a circumferential channel, and
• an axial bore, said axial bore configured to receive said rigid locking rod;
• and
• at least one lock element configured to removably engage said at least one circumferential groove of said rigid locking rod within said axial bore, securing said rigid locking rod in swiveling engagement with said insert.