The TRP (Tactical Response Pistol) is Springfield's duty-grade 1911, built to tighter tolerances and featuring an integral Picatinny rail, a match barrel, and a corrosion-resistant finish. The commercial version of the pistol developed for the FBI HRT contract. Type: Semi-Auto Pistol Action: Single-Action Caliber: .45 ACP Capacity: 7 Year introduced: 1999, USA Weight: 42 oz Overall length: 8.6" Status: Active Intended use: Duty, Tactical