This is the extended KRISS DMK22 Magazine that holds 25 rounds of .22LR. This magazine is made from high strength polymer. Using this magazine in your DMK22 will hold the bolt open after the last round is fired, allowing you to reload the same way you would with your AR-15.
This magazine is for the KRISS DMK22 rimfire sporting rifle, and not for use with the Vector 22. Not tested for use with any other platform.