Fortis Manufacturing, Inc., RED Brake, Muzzle Brake, 9MM/350 Legend, 1/2x28, Black Nitride Finish WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov 4140 Steel Control Shield Compatible Nitride coated For the 9MM 1/2 x 28 TPI Comes with a crush washer 2.9 ounces 2.28 inches Made in America Fortis' Rapid Engagement Device, or better known as the Fortis RED, is a brake that stays true to their brand. Fortis wanted to develop, engineer, and design a military grade accessory that not only functions great, but looks great also. Tested and evaluated by people in the military and law enforcement community - then put to the test by members of the 3-gun community, they came up with this design. Tested under harsh full auto conditions, the RED doesn't disappoint. Now control shield compatible! Keep your speed and accuracy up. Put more down range and on target.