JE Machine Tech A2 5.56/.223 Birdcage Flash Hider w/ Crush Washer Black. Whether building a clone rifle or just looking for superior flash signature reduction you cant go wrong with this classic. Specifications for JE Machine Tech A2 5.56/.223 Birdcage Flash Hider w/ Crush Washer: Manufacturer: JE Machine Tech Color: Black Fabric/Material: Steel Length: 1.75 in Inner Diameter: 0.86 in Features of JE Machine Tech A2 5.56/.223 Birdcage Flash Hider w/ Crush Washer 1/2-28 thread for .223/5.56 only Phosphate finish Package Contents: JE Machine Tech A2 5.56/.223 Birdcage Flash Hider w/ Crush Washer Crush Washer JE Machine Tech TS-FH2B: A2 5.56/.223 Birdcage Flash Hider w/ Crush Washer Black