Replacement breech / barrel o ring seals for the FX Streamline air rifle.

Supplied in packs of 5 depending on the seal your rifle requires.
Available in:
.177 (4.5mm) – FX part ref: 2529
.22 (5.5mm) – FX part ref: 19726
.25 (6.35mm) – FX part ref: 4526
.30 (7.62mm) – FX part ref: 19209
.25 (9mm) – FX part ref: 19722

This is the seal that sits inside the barrel.
Worn or damaged breech seals can cause loss of power and consistency, which can lead to inaccuracy.