Trimmed down the back of the spine on the MRX mags about 1/8". That stopped the action being stuck. Of note, the last shot hold open does not engage with these mags. They were made for the BCL bolt rifles and as such the follower does not move up high enough when empty to engage the bolt stop. The follower stops against stops at the front end of the mag body. Not sure if milling away some of the material on the body surrounding the front end of the follower to allow the follower to go higher is wise. Off to the range tomorrow. Will let everyone know here how it went.
Cheers
Moe
Cheers
Moe
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