The Troy A4 is a mid-priced AR-15 with Troy's Delta Rail free-float handguard and enhanced lower with ambidextrous controls, built on Troy's in-house billet receivers. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2010, USA Weight: 96 oz Overall length: 35" Status: Active Intended use: Sport, Home Defense, Tactical