Abstract: Provided is a firearm noise suppressor attachable to a firearm barrel. The suppressor includes a first housing attachable to a muzzle end of a firearm barrel, having a forward end first cap, and enclosing a blast chamber adjacent the muzzle end defined rearward of a barrier wall having a first axial passageway therein, a first brake chamber positioned forward of the blast chamber barrier end wall, and a first baffle module having a second axial passageway therethrough that is in axial alignment with a bore of the barrel and a plurality of longitudinally aligned separated baffle units. Each baffle unit includes a plurality of circumferentially spaced, longitudinally extending helically curved chambers with closed longitudinal ends. The helically curved chambers are in fluid communication with the second axial passageway.

Abstract: Disclosed is a muzzle brake for a firearm having a barrel with a muzzle and a bore extending along a longitudinal axis. The muzzle brake includes a body with an axial passageway substantially axially aligned with the bore. A high pressure chamber in the body receives combustion gases from the muzzle and includes at least one outlet port for venting a first portion of the combustion gases in the high pressure chamber. A second chamber in the body, forward of the high pressure chamber, receives at least a second portion of the combustion gases from the high pressure chamber. The second chamber has two opposing side openings in the body and includes a rear wall and a rearwardly-facing front wall upon which the second portion of the combustion gases impinge. The front wall has two rearwardly curved surfaces transverse to the axial passageway that form an apex transverse to the longitudinal axis.