The mark X is a great commercial mauser action and most had adjustable triggers. The most accurate rifle i have ever owned was a 30-06 mark X, the second most accurate was a 7mm rem mag mark X. I still have the 7mm rem mag. My brother has the 30-06. Both where yugoslavian factory guns from 82-84. They are date stamped on the right rear of action. Sometimes the stamp is under the stock. I believe there are a few different models, mark x, whitworth, 4 different stock options, high grade wood, low grade wood, foam filled plastic, full length mannlicher high grade wood.