Inspired by the XM 177 Moderator, this extended flash hider is designed to bring a 12-1/2 inches barrel to a legal non NFA length when permanently pinned and welded. Overall length of 4.15 inches (adds approximately 3.56 inches to the barrel length when pinned and welded) with a 1 inches diameter (5) flash hiding ports with a sealed bottom, designed similarly to an A2 flash hider for reduced muzzle flash and improved stealth during firing 1/8 inches pre-drilled hole for easy pin and weld installation Heat-treated for enhanced strength and durability Phosphate-coated for superior corrosion-resistance Milled flats for easy installation, providing a secure and straightforward fit CNC machined from bar steel for precise tolerances and superior strength Fully precision-machined in house at KAK Industry for superior quality and craftsmanship