The 870 MCS is a military-specification modular pump-action shotgun system with interchangeable stocks (pistol grip / standard / folding), barrel lengths (10"/14"/18"), and magazine configurations. Adopted by US SOCOM for breaching and close-quarters operations. Type: Shotgun Action: Pump-Action Caliber: 12 Gauge Capacity: 6 Year introduced: 2007, USA Weight: 208 oz Overall length: 28.5" Status: Discontinued Military use: Yes Intended use: Military, Law Enforcement