The 12 gauge PROMAG MKA-A1 20 round drum is made to run in the AR style MKA1919 semi-auto shotgun and I have no doubt that it does. I however purchased one to see if I could get it to run in my PANZER ARMS BP12 also AR style. The metal casings are nearly identical so I gambled on being successful in making any necessary adjustments. Comparing a working BP12 mag to the MKA-A1 gave me the simple but necessary adjustments required. Out to the range for testing and lo and behold it worked great, but don't just take my word for it. Go to the YOUTUBE and search belowto see the test and a description of the required adjustments. Done correctly, your BP12 will become your favorite item to take to the range or to defend your family from future hoards of miscreants or zombies. Hopefully the aftermarket will catch up to it's rising popularity and produce a version dedicated to the BP12.
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Reviewed by: Kenny Bill from North Carolina.