Dongsan K.T.W. M1873 Downgrade spring
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Original KTW / Dongsan M1873 downgrade spring.
Suitable for the KTW / Dongsan M1873 models.
The spring reduces the energy to about 0.6 joules - and it is then easier to cock.
In original condition, the M1873 has approx. 0.9 joules.
Suitable for the KTW / Dongsan M1873 models.
The spring reduces the energy to about 0.6 joules - and it is then easier to cock.
In original condition, the M1873 has approx. 0.9 joules.
![](/catalog/images/b-dongsan-m37-tuningfeder-details1.jpg)