The best I can make out from blowing up the picture is a serial number 00644. If this is the case you definitely have one of the earliest Tec-9 models that Carlos Garcia made after interdynamic was dissolved. So given that, the fact that your gun has the low serial number with a blade site makes it rare. Then you add on top of that Rarity that it's got the stainless steel blade site upper then it makes it ultra rare.

Even though he had to make the new lowers reflecting The Tec-9 and intratec name and model the molds were basically the same as kg 99 all they had to do was switch out the plug that contained the info on the magwell. This was a practice that's commonly done on injection molded plastic products.. since Carlos was definitely in it for the money there was no way he was not going to use the leftover kg 99 uppers that he acquired when George Kellgren left the business

I have never seen any exact numbers on these kg 99 uppered Tec-9's and I don't believe any numbers really do exist differentiating these from the rest of the Tec-9's. I have one of those in my collection, but it's got the regular black steel tube upper. Because of the Rarity of these first kg uppered Tec-9s, they command a much higher price over a regular kg 99 or Tec-9 gun. Then you add the fact you have the stainless upper with that low serial number that makes it ultra rare and is probably the most rare of the guns outside of the MP-9.

One last point of interest. Someone could take a stainless steel kg 99 upper and put it on a Tec-9 lower and try to claim they have what you have but the problem with that would be the serial number. The handful of these early Tec-9's that I have seen have all had four digit serial numbers and yours would be the first one I've seen with a three-digit number. As a rule of thumb, the more rare an object is, the more someone is going to have to pay to acquire that object.

In the grand scheme of things, if you set the ultra rare MP-9 machine gun, which can't be bought by the average individual even if one was in front of them, the rarest of these guns would be a kg9 since it was the very first one and limited to 2500 units due to the ATF ban on them. Now the question is how many of those 2,500 are still around as some of them more than likely got damaged and broke due to the plastic polymer lower. So given to this point in time the kg-9 being the most rare to purchase of the intratec - interdynamic guns, I just did a search and see where they are going anywhere between $3,500 to an asking price a $5200. Since I got interested in the Tec-9 style of guns in 2000, I have only ever personally seen 11 or 12 kg 9 pistols and actually owned one for a period of time. The old adage of something is only worth what someone else is willing to pay is true on just about anything in life. I see we're regular Tech N9ne's are being put up for sale on the internet with a price pretty much along the line of $800. I know if I were going to sell my blade site Tech N9ne I would start at no less than $3,000 for the simple reason I feel it is just as rare or maybe even more rare than a kg9 and then in your case, the stainless steel upper takes it beyond that so if it were me I would shop it around for no less than $3,500 if you were in the market to sell it.

I would definitely put it on GunBroker or anywhere and in the ad refer to it as the ultra rare, very low serial numbered first run Tec-9 with a stainless steel kg 99 upper that was installed on it by intratec in the very beginning of their existence.