The main difference between the RRR chainmail (round ring, riveted) and an FRR chainmail (flat ring, riveted) lies in the historical period and weight. In terms of protection, both variants are suitable for reenactment combat due to their full riveting and offer a high level of safety. However, the FRR variant with flat rings offers the advantage of lighter weight with comparable stability. Regarding historical authenticity, the RRR chainmail with round rings is the correct choice for portrayals of the Early and High Middle Ages (e.g., the Viking Age), as flat rings are not documented for these periods. Flat ring chainmail like the FRR only appeared in the Late Middle Ages (14th/15th centuries) and is therefore more authentic for later portrayals.