The Mag Conversion Bar is used to retain the magazine in the chassis and is caliber specific.
Our quality control department along with our engineering and production team worked together to minimize tolerance stacks through our manufacturing process, which has allowed us to increase the tolerance of our MDRX magazine conversion bars.
With this improved process, we are now able to improved magazine retention on all new MDRX rifles. This caliber specific conversion bar will work for all MDR and MDRX Rifles.
This part is only necessary if you are experiencing mag retention issues or if you have misplaced your caliber specific Mag Conversion Bar.
If your MDR or MDRX rifle is retaining your magazines without issue, upgrading this part is not necessary.