Federal XM193, 5.56 NATO, 55 Grain, Full Metal Jacket, 500 Round Case administrator March 3, 2018 Federal XM193, 5.56 NATO, 55 Grain, Full Metal Jacket, 500 Round Case2019-08-15T11:36:47-04:00 Ammunition, Bulk Ammo, Firearms 029465094607 Manufacturer: Federal Manufacturer Part #: XM193 Model: XM193 Caliber: 556NATO Grain Weight: 55Gr Type: Full Metal Jacket Units per Box: 20 Units per Case: 500 Subcategory: Rifle Ammunition