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Search Eddie Barber & AIRGUNAID SP5 .20 Hunter (loads on here on the subject), for basically, the DG .20 is the same gun. Eddie (also of AGW fame) and Don developed these Milbro-based hybrids in unison. Hope this helps?
Thank you for the info,have read most everything to find,more a case of seeing what's left and if there are any available as I have a good complete action but no .20 barrel seems a pity not to try to get it back to the way it should be,thanks again Gareth W-B.