This Browning Magazine is made for BARs designed for extended detachable box magazines. These are special versions only and designated as the BAR DBM in 308 caliber. Staggered box magazine, formed steel body and feed lips, polymer base plate and shoulder. Please note that it does not fit similar models such as the Hog Stalker.
This replacement magazine is a factory original from Browning. Factory replacement parts are manufactured to the exact same specifications and tolerances and use the same manufacturing materials as the original parts which guarantees excellent fit and reliable operation. Keeping a few extra factory magazines around is never a bad idea; extra magazines save loading time at the range and also serve as a backup for those days when you simply cannot remember where you put your primary magazine.