MANUFACTURER: ProMag FAMILY: AR-15 Rifle Series MODEL: AR-15/M16 Rifle Magazine TYPE: Accessory-Magazines ITEM GROUP: Rifle Magazines CALIBER/GAUGE: 223 Rem | 5.56 NATO CAPACITY: 42 SHIPPING WEIGHT: 0.4 lbs. ADDL INFO: Black Polymer MFG MODEL NO: COL-A16B UPC: 708279012679