The Aero Precision M4E1 in Cobalt Cerakote is a limited-finish variant that demonstrates Aero's special-edition program. The Cobalt blue Cerakote finish is applied to both upper and lower receivers, handguard, and buffer tube. Standard 16-inch mid-length chrome-lined barrel and M4E1 enhanced receiver internals are unchanged. Special-edition finish ARs from quality manufacturers at Aero's price point are uncommon. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2019, USA Weight: 62 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Competition, Target Shooting