Regarding the stock, after their adoption, quite some T81s with fixed stocks were reported by PLA to have developed sizable cracks in a couple of years of handling. Further, the cost was a bit higher making the fixed stock version (China is timber scarce). Therefore, when technology rendered the sate arsenals the ability to make folding ones with acceptable qualities for combat situation, the folding stock T81s soon became the major issued version for PLA and the Chinese police force. The wood used for the original T81 fixed stock is Chinese Catalpa wood.