Ported to 9MM,  1/2" x 28 Stainless Steel 2-Port Brake with External Thread fits 9MM Rifles and Pistols threaded to 1/2" x 28.    304 Stainless Steel Construction.  Black Matte Nitrite Finish.  The 3/4" NPT external thread accepts all of our Heavy Duty, 7075 AL Redirect Sleeves.