The original DeLisle was chambered for the .45 ACP and used GI M1911 magazines; it also had a short barrel and a silencer. The one pictured is a modern repro with an 16" barrel and a dummy silencer. I knew they were being made in .45 ACP, but had not known they were being made in .44 Magnum.
As to making one, I don't think it would be very hard, but the cost could get high unless one is capable of doing most of the work.
What does the repro sell for?
Jim