The DPMS Lo-Pro Classic features a flat-top receiver with a low-profile gas block replacing the traditional front sight tower, providing a clean rail for optic mounting without co-witnessing issues. One of the first production ARs with a dedicated low-profile gas block. Type: Semi-Auto Rifle Action: Gas-Operated Caliber: 5.56x45mm Capacity: 30 Year introduced: 2001, USA Weight: 7.4 oz Overall length: 36.5" Status: Active Intended use: Range, Precision, Hunting