Muzzle brake device for the Esper homemade. Requires an 8-inch length of 10-32 threaded rod, a 5 to 6 inch length of 5/16" OD nylon tubing, two hex nuts, one 4-40 screw, and a 6-inch length of 7/8" OD PETG tubing to be installed.
All offered as a hardware kit in my Etsy shop (along with the hardware for the foregrip kit).