Smith & Wesson M&P Piston Upper 223Rem 16

16 Barrel - 5.56 mm NATO - Troy 7 Modular Quad-Rail Handguard - Chromed Barrel Bore Gas Key Bolt Carrier Chamber - Adjustable Gas Port - 1-Piece Bolt Carrier - Upper assemblies may not be available for sale in all states and locales due to feature-based restrictions on firearms. Prior to purchasing contact your local law enforcement agency to verify that this product may be legally purchased and possessed in your state and locale.