Lò xo nâng cấp đơn vị sig556

Spring upgrades for dcobra units of the same size as:

- M790.
- M890.
- M416 / ar15
- M306.
- M788 / p788
Etc

Xchus m416 / ar15 musti papas a little spring guide holding per (lower side do not be too tapas) for per lbh to be free. *