I neglected to mention that there is
an "available" ANH DH-17 replica in metal: Master Replica's Rebel Trooper Blaster
It was a limited edition, sold at $450 USD in stores but the prices on eBay now
are around three times that.
It was also made from solid
metal so it is ridiculously heavy.
Where did you buy yours?
The one in my avatar picture is a highly modified Hasbro, made into a ESB version over many hours.
The Hasbros are very light, being made of hollow plastic. Like most replicas, it was based on Master Replicas' interpretation of the original, but some details such as the trigger are different and the toy is shorter.
My conversion was lengthened in the back but is smaller than an original blaster in front of the trigger.
I saw that you are the RPF, and you might already have seen this: 3D printed DH-17 Blaster - work in progress
. I have seen 3D-printed blasters on eBay that I think were made from this guy's files - if not by the same guy.