The R1 Enhanced adds front serrations, an ambidextrous safety, beavertail, and an 8-round flush magazine to the base R1. Attempts to bridge the gap between the base R1 and the more expensive Springfield Loaded in feature content. Type: Pistol Action: Semi-Automatic Caliber: .45 ACP Capacity: 8 Year introduced: 2012, USA Weight: 39 oz Overall length: 8.5" Status: Discontinued Intended use: Range, Service