This magazine gives the MRX Bison user a 20 round capacity in a magazine that is specficially designed for the MRX Supershort Action and will not fit or function in an AR15 or any other semi-auto rifle.

The MRX MAG is a double stacked, straight magazine made from a proprietary blend of polymer. The MRX MAG has extended length feed lips and a no-tilt follower design that allows ultra smooth and reliable feeding. The MRX MAG uses “follower stop ledges” which keeps the follower from topping out, which allows the MRX Supershort bolt to be manually pushed forward when the magazine is empty and still in the rifle, which is not possible with an AR15 magazine.

This magazine is compatible with the BCL MRX Bronco & Bison chambered in in 5.56/223 & 300 AAC Blackout.

Specifications:

• Caliber: 5.56 NATO/.223 Remington/.300 AAC Blackout
• Capacity: 20 Rounds
• Material: Polymer
• Compatibility: Black Creek Labs MRX Bronco and Bison