M2 Armament Group AR-15 Mil-Spec Charging Handle Black. Engineered to withstand high-stress clearing drills aggressive single-handed manipulation and heavy recoil schedules this heavy-duty charging handle provides uncompromising reliability when operating under severe conditions. Specifications for M2 Armament Group AR-15 Mil-Spec Charging Handle: Manufacturer: M2 Armament Group Color: Black Fabric/Material: Aluminum Caliber: 5.56x45mm NATO Gun Make: AR Platform Gun Model: AR-15 Length: 6.5 in Package Contents: M2 Armament Group AR-15 Mil-Spec Charging Handle What firearm models does the manufacturer say M2 Armament Group AR-15 Mil-Spec Charging Handle is compatible with? The manufacturer says that M2 Armament Group AR-15 Mil-Spec Charging Handle is compatible with AR-15M2 Armament Group M2-CH: AR-15 Mil-Spec Charging Handle Black