The Phase 5 Weapon Systems EC-P is a 5.56mm pistol-configuration AR built around Phase 5's proprietary pistol buffer tube and end plate with QD sling socket, offering a compact package with practical sling attachment. Type: Pistol Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2015, USA Weight: 52 oz Overall length: 25.5" Status: Active Intended use: Home Defense, Tactical