Will Old Style G21 Mags Work In My Kriss

I have a chance to buy some new 13 round G21 mags at a good price locally. The only mags I currently have are the Kriss 25+ mags which have the mag catch notch on both sides of the mag. The G21 mags that I am looking at have the notch on the left side only. Will they work in my Kriss? If the will then I will add the Lone Wolf two round extensions for $9 each making them 15 rounders.

Any help would be greatly appreciated,
MadDog

Yes they will.

I made a sticky a while back showing all the variations of G21 mags. The only one I do not have is the LE/MILT Only style ones.