This hardened steel parts are manufactured under CNC process. The polymer wheel is an expendable item which specially protecting the loading nozzle and housing. This item:
1) strengthens construction and increases durability;
2) improve shooting efficiency;
3) maximise opening valve on magazine;
4) uses the polymer wheel to avoids wear and tear on other parts around it. And the guarantee service life of eash polymer wheel is 5000 shoots.
