DG is Daytonagun, its an external air system.

For parts all of em are pretty good.

Daytonagun parts you just order straight from Justin Lee himself or trade for replacement. (those parts don't break easily as they're high quality steel)

WE you can order spare parts from WE, but overall still lose to KJW in terms of replacement.

WA has the most third party accessories

KJW has KJW back them for spare parts.

Oh, so Daytonagun. I think I've watched a video that someone posted up.
Is any of those gun comes with a full metal receiver in Canada? I know I can place the custom order from the retailer but just to make sure.
I think I'm going to stick with KJW.

The DG internals kit cost more than the KJW.

Yes..as I expected. Because that thing isn't easy to invent at all.

Have one more question about the blowback system.

I know that I can change the buffer and spring for WE to get a harder recoil but does KJW have same way as WE does?