The striplula is a military-quality 5.56 /.223 cal 10-round magazine loader. It facilitates loading both 10 rounds from stripper clips and 10 loose rounds into a magazine. It does so quickly safely in comfort and painlessly. This model is compatible with m4/ar15 metal polymer stripper clips and magazines.Caliber: 223 Rem/5.56Capacity: 10 rdFinish: BlackMaterial: PolymerType: LoaderModel Fit: AR-15