TacFire MZ1021 Thread Crown Muzzle Brake Black Oxide Steel with 1/2"-28 tpi Threads & 2.05" OAL for 5.56x45mm NATO AR-15
http://www.tandktactical.com/shop/811261028562-tacfire-mz1021-thread-crown-muzzle-brake-black-oxide-steel-with-1-2-28-tpi-threads-2-05-oal-for-5-56x45mm-nato-ar-15-16246
http://www.tandktactical.com/web/image/product.template/16246/image_1920?unique=30f7254
TacFire's Thread Crown muzzle break is constructed of steel and made in the USA. This 223/5.56 model has 1/2"x28 tpi and a black oxide finish.
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