This listing is for a pack of 5 new barrel/breech seals for the CBC Sentry & Sentry HC air rifle.

Commonly replaced spare part – sits on the pellet probe and is easily damaged on this model as it can catch on the magazine. Damaged or worn breech seals can cause loss of power and/or accuracy.

Available in .177 (4.5mm), .22 (5.5mm) or .25 (6.35mm)