Firearm suppressor

A suppressor for a firearm defining a distal end and a proximal end, the suppressor comprising:

• an inner body comprising:
• a muzzle attachment portion;
• and
• a plurality of baffles each defining an opening, wherein the openings of the plurality of baffles collectively define a linear projectile path through the inner body along an axis extending from the proximal end of the suppressor to the distal end of the suppressor defining an exit opening, wherein an expansion chamber is defined between the muzzle attachment portion and one of the plurality of baffles;
• and
• an external shroud configured to removably couple to and at least partially cover the inner body, wherein the external shroud is configured to permit at least a portion of propellent gas within the inner body to exit the suppressor via a secondary opening defined between the inner body and the external shroud,
• wherein the inner body defines a flange that defines a circumferential groove that is configured to receive a distal end of the external shroud, wherein the flange defines a labyrinth structure configured to define one or more flow directional convolutions between the flange and the external shroud, and
• wherein the distal end of the external shroud is inserted into the circumferential groove.

A method of assembling a suppressor, the suppressor defining a distal end and a proximal end, the suppressor comprising an inner body and an external shroud, the inner body comprising:

• a muzzle attachment portion defined at or proximate the proximal end of the suppressor and a plurality of baffles each defining an opening;
• and
• a flange that defines a circumferential groove, wherein the flange defines a labyrinth structure configured to define one or more flow directional convolutions between the flange and the external shroud,
• the method comprising:
• inserting the inner body into the external shroud until the external shroud at least partially covers the inner body and a proximal end of the external shroud is inserted into the circumferential groove of the flange of the inner body;
• and
• removably coupling the inner body to the external shroud, such that the inner body and the external shroud are fixed relative to each other, wherein the external shroud is configured to permit at least a portion of propellent gas within the inner body to exit the suppressor via a secondary opening defined between the inner body and the external shroud.