I'm a M1919 newbie, so far still rounding up parts.
I have a kit, spare barrel, rivets and a MG42 tripod adapter.
The internals are going out this week for machining.
I'm waiting on ORF to get some RSPs and KMP to get some more triggers and sears.
The pricing on tripods is scary, the ones I've seen go for $800 to $1000. (M2's w/T&E)
I found re-pro's for $500.
MG42 AA pods can be had for under $100, so I bought one of these adapters.
I kinda like the thought of being able to stand up while firing, but I may add a M2 later.
I got this on a GB for $210. it holds two ammo boxes, one for the ammo and one to catch the links.