Just change the gauge seal into the mount block, and the gauge block seal as they are separate from the rest of the gun and easy to change without disturbing anything else. Never seen a gauge itself leak internally on any gun, and it would be unusual if it did. I've seen it on larger industrial gauges where the internal bourden tube has fractured though.
Sometimes the gauge mounting block just needs a nip with the hex key. Look at the Air arms site for diagrams or Julian Bonds airgun spares site for the same, and prices. No connection to me other than being a satisfied customer.
It certainly wouldn't put me off buying it.
Last edited by DEAN C.; 19th February 2016 at 09:08 PM.