Mystery RSAF Barrel fitted to Envoy

[Lance]

It appears that this rifle was the village bicycle. The barrel is tight against the body, with no sign of a gap or shims.

[Surpmil]

It appears that this rifle was the village bicycle. The barrel is tight against the body, with no sign of a gap or shims.

By that I meant with the bolt open and looking into the mouth of the chamber, is there the usual gap between the rear face of the barrel and the corresponding face of the receiver, or are they tight against each other?