The 5- and 10-round magazines are for the MK II series.
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Submitted By: Dennis K. On 03/26/2017
Hit and miss with this particular magazine, I purchased 3 and all of them will not feed properly when loaded with 10 rounds. They do function properly with 6 or 7 rounds. Trying the Stainless steel ones.
[2 of 5 Stars]