KAK Industry Retro Extended 4" 5.56 Flash Hider - 1/2x28

The KAK Industry Retro Extended 4" 5.56 Flash Hider - 1/2x28 features milled flats for easy installation. When pin and welded, this flash hider extends a 12.5" barrel to legal non-NFA lengths and comes with a .125" pre-drilled hole for easy pin and weld. This flash hider's design was inspired by the XM-177 Moderator, and it features CNC-machined, heat-treated bar-steel construction with a corrosion-resistant Phosphate finish for superior strength and lasting protection against wear in the field. Does NOT include a crush washer. Overall length is 4.15". 1/2x28 threads.