Bren L4 / .308 build

[cal50]

Looking at the pics I assume that the receiver was cut with a plasma cutter when it was made into a parts kit. Is that, generally how most parts kits are cut, with a plasma cutter, or are some cut with an oxyacetylene cutting torch? Whoever did the cutting of this receiver certainly appears to "have given it some" with the cutting, looking at the pictures posted here.

Our BATFE requires all imported MG receivers cut with a oxy torch with a minimum of material removed in certain areas, at certain angles.
Some importers got creative with saw or plasma cutting then feathering the edge with a torch to make it appear like an oxy torch cut but that runs the risk of them being rejected.

Mine was for sure by the torch.

Its an L4A3.