MANUFACTURER: ProMag FAMILY: AR-15 Rifle Series MODEL: AR-15 Polymer Rifle Magazine TYPE: Accessory-Magazines ITEM GROUP: Rifle Magazines CALIBER/GAUGE: 223 Rem | 5.56 NATO CAPACITY: 5 SHIPPING WEIGHT: 0.2 lbs. ADDL INFO: Anti-Tilt Roller Follower MFG MODEL NO: RM-5 UPC: 708279013614