A new barrel may have been fitted when these rifles were taken out of storage in Britan after the outbreak of the Second World War,....apparantly there was a sufficent spare parts for these rifles held over from WW1.....except for springs and stocks...these components were contracted out to varous companies such as RSAF Enfield,..Holland and Holland and BSA.
The US found that that the Model 1917 had a shortage of spare barrels...oders for new barrels were place with Hi-Standard Manufacturing and Johnson Automatics.