They couldn’t have put a pair of iron sights on the thing? If they’re only giving you two shots you really want to be sure they count, no?
The porting should help with the recoil from such a light pistol and heavy caliber. Sights aren't really necessary because is is a very CLOSE range defensive pistol. As far as recoil goes, if you had to use the Heizer Double Tap to defend yourself, odds are that your adrenaline would be off the scale and you wouldn't notice the recoil. I'd be interested in the Double Tap, if the company offered a “Double Double Tap” with 4-shots. I like the extra two rounds of life insurance. This is a perfect backup pistol.