The standard A2 Flash Hider for the AR15 / M16 – often called the “birdcage” flash hider has 5 venting slots machined around sides & top with the bottom closed so as to avoid a tell-tale “dust signature” when shooting prone. It is machined from high quality steel, threaded 1/2″ x 28 T.P.I. (threads per inch) pitch and finished in Black Phosphate. Install this with a crush washer to properly “time” (position) the venting slots. 1/3/4″ overall length.
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