BRAND NEW Defiance Machine Detachable Bottom Magazine (DBM) Housing for a Long Action. Works with Accuracy International type box style magazines. This thing is awesome as it has a spring loaded "tab" that sits on the top side of the magazine. It prevents rattling of the mag and helps tremendously with mag ejection. $255 and FREE SHIPPING to the lower 48. Thanks for your consideration and please let me know if you have any questions.