Suppressor mounting device

An attachment element for a firearm having a muzzle comprising:

• a body defining a body bullet passage on a bore axis and having a first attachment facility at a first end;
• the first attachment facility adapted to connect to the muzzle of the firearm;
• the body having a second attachment facility;
• a device adapted to removably and rotatably connect to the second attachment facility;
• a retention facility connected to the body, encircling the bore axis, and movable between an engaged position in which the retention facility abuts the device and a disengaged position in which the retention facility is spaced apart from the device;
• wherein the retention facility includes a ratchet mechanism that when in the engaged position permits rotation in one direction and prevents rotation in an opposite direction inhibiting removal of the device from the body;
• the device having a plurality of engagement features and the retention facility having a mating surface feature that are engaged to each other to prevent rotation of the device with respect to the body when the retention facility is in the engaged position;
• and
• the retention facility having a surface contour.