At the 2012 NASGW Expo, Heizer Defense was spreading the word that they would be introducing a small pistol in the near future. Jim Bruchas, the director of sales for Heizer Defense, suggested the new gun would be very similar to the DoubleTap pistol they had been contracted to produce for DoubleTap Defense before that relationship soured.
Here are the photos of the new Heizer Defense pistol.
As you can see, the new Heizer handgun bears a striking resemblance to the DoubleTap pistol. Frankly, other than a few minor cosmetic blemishes, I cannot see much of a difference.
At the NASGW Expo, Bruchas told me that the DoubleTap pistol was uncomfortable to shoot, and that an ergonomic change would be made to improve the handling and reduce felt recoil. Presumably, a change in the backstrap area of the gun might accomplish this. From the images, it is hard to tell if any significant modification was made.