There were a total of 125 TC's. Initially 25 were made in response to requests for an SR9T with the PSG1 buttstock. H&K did not have these in their catalog. The next year, HK added the SR9TC to their catalog and imported 100 guns. They were marked "TC" in Virginia as were the SR9T's. In 1989 the BATF had not determined what was considered acceptable as to what grips were fitted to the rifles by H&K USA the new rules were not set to be "in-force" until November 1990. For years, it was acceptable to reconfigure standard SR9 rifles to a T or TC configuration. T and TC rifles were probably not imported in that configuration and that is why the receivers are hand stamped and not finished. The stamping was done at H&K USA.