These O-rings will replace any worn, deformed or lost rings from any JP Silent Captured Spring or Variable Mass Operating System (VMOSâą) bolt carrier. Replacement of O-rings should take place when you start to see fraying or cracking of the rings. This will happen sooner in the case of 9mm carbines, around 5000 rounds.
Dessa O-ringar kommer att ersĂ€tta alla slitna, deformerade eller förlorade ringar frĂ„n nĂ„gon JP Silent Captured Spring eller Variable Mass Operating System (VMOSâą) bolt carrier. Bytet av O-ringar bör ske nĂ€r du börjar se fransande eller sprickor pĂ„ ringarna. Detta kommer att hĂ€nda tidigare i fallet med 9mm karbiner, runt 5000 skott.