many of these were built on 96 mausers ,the peep is not as bothersome as the scope mount i have a gibbs with the same peep probably done around when the gun was built , the scope mount looks real late on this fraser ,i,m sure the holes can be cleaned up as for it being rebarelled not familiar with darlington??however you cut it , these guns are very rare and probably not many left that havent been fooled with... the price seems nice too ...paul