The Model 327 TRR8 (Thunder Ranch Revolver 8-Shot) Night Guard is a Scandium N-Frame .357 Magnum 8-shot revolver with integrated Picatinny rail, XS tritium sights, and matte black finish designed for tactical law enforcement use. Type: Revolver Action: Double-Action Caliber: 357 Magnum Capacity: 8 Year introduced: 2008, USA Weight: 36.3 oz Overall length: 10.5" Status: Active Intended use: Law Enforcement / Tactical