M4 SOPMOD II

Note that M4 SOPMOD II name refer to two things. M4 Carbine, the assault rifle. SOPMOD II, the set of accessory kit issued to special operative units of united states Army such as Delta Force, Navy Seals and Army Rangers. The M4, carbine assault rifle developed from M16A2, chambering 5.56×45mm NATO, air-cooled, direct impingement gas-operated, magazine-fed. It has a 14.5 in (370 mm) barrel and a telescoping stock. The M4 carbine is heavily used by the United States Armed Forces and is replacing the M16 rifle in most United States Army and United States Marine Corps combat units as the primary infantry weapon[1]. U.S. Special Operations Command (USSOCOM) developed the Special Operations Peculiar Modification (SOPMOD) Block I kit for the carbines used by units under its jurisdiction. The kit features an M4A1, a Rail Interface System (RIS) handguard developed by Knight's Armament Company, a shortened quick-detachable M203 grenade launcher and leaf sight, a KAC sound suppressor, a KAC back-up rear sight, an Insight Technologies AN/PEQ-2A visible laser/infrared designator, along with Trijicon's ACOG TA-01NSN model and Reflex sights, and a night vision sight. This kit was designed to be configurable (modular) for various missions, and the kit is currently in service with special operations units[3]. A second-generation SOPMOD kit (now known as SOPMOD II) includes innovative optics, such as the Elcan Specter DR, Trijicon's ACOG TA-31 ECOS model, and the Eotech 553. Block II uses the RIS II rails manufactured by Daniel Defense in both a 9.5 and 12.5 length[4].