The Browning BAR Mark II Magazine is a standard factory replacement magazine. This magazine is for BAR Mark II models chambered in .243/.308 Winchester and holds 4 rounds of ammunition. It is made of steel and is made to Browning's specifications and tolerances, using the same manufacturing and materials as the original equipment magazines, ensuring perfect fit and operation.Specifications and features:Browning 112025011.243/.308 Winchester4 RoundsSteel