TsKIB was an exclusive gunmaker at all times. It’s difficult to estimate production numbers, as they don’t release the figures for models that are still made. There were, all in all, about 4500 MTs-8, about 4000 MTs-6, and even fewer MTs-5. “Russian Purdeys” – MTs-11 and TS-2, copies of the famous Beesley patent self-opener – number about 600 and 125 respectively. The current top-of-the-line models, MTs-111 and MTs-109, were made at the rate of about 12 guns per year (since 1970-1971) and so there can’t be more than about a thousand of them, perhaps much less. Out of these figures, TsKIB’s total output can be estimated at about 25,000 guns. How many of these were exported? My guess is about 10%, and it’s likely to be on the overestimating side.