Fortis Rapid Engagement Device or better known as the Fortis RED(TM) is a brake that stays true to Fortis brand. They 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 Fortis came up with this design. Tested under harsh full auto conditions the RED(TM) doesnt disappoint. Now control shield compatible! Keep your speed and accuracy up. Put more down range and on target. Try out the Fortis RED(TM)Features :4140 Steel constructionNitride coated1/2X28Comes with crush washerMade in the USA