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Not my real name. from United States, NC Public Profile
They are passing off 9mm muzzle brakes off as 556. They have since changed and stopped advertising them as 556 but just as 1/2 x 28. The pictures clearly show a difference between the 9mm and 556 inside diameter but they are marking the 9mm .410 inside diameter as being both 9 and 556. I don't know how effective a small brake can be if the inside is so much larger than maybe .250 for 5.56
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