You can't hear the twang of a release catch in a lock mechanism, but with enough practice you can feel it.

Stevens fumbled with his weapon's release catch, then felt the magazine slide easily and fall from the weapon to the floor.

"Is the release catch on your shock harness working?"

I hit the release catch and the empty mag hit my leg on its way to the floor.

I smacked it on and hit the release catch.

The box was locked and there was no sign of a keyhole or a release catch.

I bet it's the release catch for the rubber mask Thatcher wears.

To change barrels, the release catch in front of the magazine was rotated to unlock the barrel.

I searched for a release catch and couldn't find one.

The release catch he found quite quickly.