Design inspired by the XM-177 Moderator, this extended flash hider will extend a 10.5" barrel to legal non-NFA length when pin and welded. * Overall Length- 6.15", 1" in diameter* Weight- 9.7oz* Heat Treated for strength and durability* Phosphate Coated for corrosion resistance* Milled flats for easy installation* Adds approximately 5.56" to overall length of barrel when pinned and welded.*.125" hole pre-drilled for pin and weld* Fully Precision Machined in House at KAK IndustryCrush washer not included