Could I ask where you got the parts for a metal one here in the UK? I've been looking for mausers for about 4 years with little to no success let alone all the other bits and pieces
the Greedo Killer was the first Metal build I planned & the last one I finished (& by far the most expensive)
to be honest it went on the back burner for a long while because I just couldn't get the parts, in the end I had some luck, I got some Scope rings on eBay, the flash hider from a member here & another agreed to machine me the Scope Mount & FH adapter, I got the Grill from CE on eBay & finally got super lucky & found a Compac Scope on eBay, All from the U.S.
I ended up with 4 spare sets of 1" Weaver scope rings & 2 extra scopes :lol as I just kept buying them each time I saw one that looked close enough
When I started I didn't think I'd ever find a Denix but got lucky there too, found some on eBay, some from members here (in Europe) & a couple more online, I've only ever found 1 place to buy them here in the UK but they're expensive at around £100 each (about double what they are in U.S. & Europe)
I started off by building all of the Doopydoos kits (& a few custom/mixed ones) but since then. I've managed to build metal versions of the ANH Hero, Greedo Killer, ESB Hoth, ESB Bespin, ESB Luke, Han ROTJ & the Merr Sonn to replace the resin ones
still love Doopydoos though, actually this made me want to build another but I can't find them on eBay?