The Remington Model 870 MCS (Modular Combat Shotgun) in 12 gauge with 14-inch barrel is a military-specification variant of the 870 designed for close-quarters combat. The 14-inch barrel requires an NFA Short-Barreled Shotgun registration for civilian ownership but is available to law enforcement and military without restriction. The MCS system includes interchangeable stock, barrel, and magazine tube components. Type: Pump Shotgun Action: Pump-Action Caliber: 12ga Capacity: 5 Year introduced: 2007, USA Weight: 7 oz Overall length: 33.5" Status: Active Military use: Yes Intended use: Military, Law Enforcement, Tactical