FN America M249S - Semi-automatic Rifle - Steel Frame - 556NATO - Para 16.1" Chrome Lined Cold Hammer Forged Barrel - Matte Finish - Para Black - Rotating/Telescoping Metal Buttstock Assembly With Hydraulic Recoil Buffer System And Non-Slip Buttplate Stock - Adjustable Primary Sights - Standard Disintegrating Link Belt-Fed - Includes Integral Steel Bipod 46-100171