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Oh BTW, It's my understanding that you can 'convert' your Sub2k to any other type magazine just by swapping the mag release with the correct part. Except for the short grip version for G19 magazines, all other sub2ks are the same except for the mag release. There's more info on the Kel Tec owner's group forum.
If you have a Sub2k made for Glock...its Glock or nothing. Seems the grip area is part of the serial numbered "receiver" part and they will not change it due toB ATF rules. (it would be a different firearm with the change in serial numbers.) However, if you buy the "other" Sub2k it can be either a Smith, Sig, or Beretta by just changing the mag latch button that you can have sent to your house and do yourself.
And, the nice lady at Kel-Tec tells me that after Christmas they are expanding their operations as they are well aware they can't keep up. They really want to up their production. I think after the Obama spike and then slowdown a couple of years back and the slow economy many businesses were reluctant to spend their capital in an uncertain market. By now Kel-Tec is seeing they really are safe in upping production. I will buy another Sub2k for my Beretta if I can find one. These little guns are just too cool.