Product Description The SureFire SF3P-556-1/2-28 is an advanced three-prong flash hider and suppressor adapter precision-engineered for M4, M16, and variant rifles equipped with 1/2x28 muzzle threads. Its patent-pending design delivers exceptional muzzle flash reduction -- typically greater than 99% compared to a plain muzzle -- while also serving as a rock-solid Fast-Attach mounting adapter for all SureFire SOCOM Series 5.56mm/.223 caliber sound suppressors. Machined from US mill-certified heat-treated stainless steel bar stock with high-precision single-point cut threads for optimum thread interface, the SF3P-556-1/2-28 is finished with a black Ionbond Diamond-Like Carbon (DLC) coating that provides maximum protection under harsh environmental conditions and facilitates thorough cleaning even after extreme use. When paired with a SureFire SOCOM Series suppressor, the design&';s multiple bearing surfaces ensure superior suppressor alignment and prevent tine ringing inside the suppressor, while a rear labyrinth seal minimizes carbon buildup in the indexing system and promotes easy suppressor removal after extended firing sessions. Each unit is individually inspected for concentricity and alignment and is covered by SureFire&';s No-Hassle Guarantee. Product Highlights Dramatic Flash Reduction: Patent-pending three-prong design reduces muzzle flash by typically more than 99% compared to a plain muzzle, keeping the shooter concealed and on target. Fast-Attach Suppressor Compatibility: Functions as a rock-solid mounting adapter for all SureFire SOCOM Series 5.56mm/.223 Fast-Attach sound suppressors, including the SOCOM556-RC. Premium Construction: Precision machined from US mill-certified heat-treated stainless steel with high-precision single-point cut threads for optimal thread interface and long-term durability. Black Ionbond DLC Coating: Hard black Diamond-Like Carbon finish resists corrosion and wear under extreme environmental conditions while simplifying post-use cleaning. Superior Suppressor Alignment: Multiple bearing surfaces and a rear labyrinth seal ensure consistent, rattle-free suppressor alignment and minimize carbon buildup in the indexing system. Specs Brand: SureFire Model: SF3P-556-1/2-28 MPN: SF3P5561228 UPC: 084871319119 Type: Three-Prong Flash Hider / Suppressor Adapter Caliber: 5.56x45mm NATO / .223 Thread Pattern: 1/2"-28 TPI Length: 2.6 inches Material: US Mill-Certified Heat-Treated Stainless Steel Finish: Black Ionbond DLC (Diamond-Like Carbon) / Black Nitride Compatible Rifles: M4, M16, and variants with 1/2x28 muzzle threads Suppressor Compatibility: All SureFire SOCOM Series 5.56mm/.223 caliber Fast-Attach sound suppressors Item Condition: Factory New FFL Required: Yes Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>