Bren semi auto build - USA

[camerl2009]

you are teasing us canucks with this one though we have to get a new receiver machined and that in it self would cost quite a bit not to mention if your design is not approved your receiver gets choped not a big deal with something like a sten but a real big deal with a bren

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[garthok]

I hate to say it, but I think I bought the last semi auto parts kit from MGS. They removed it from their online store just after I bought it. After several hours of grinding slag, everything "fits". I am torn between paying somebody to do the welding or learning to weld on my own. Both can be expensive. I have ordered the gas selector and a magazine, and MGS is sending me the missing barrel bolt. Anyway here it is roughly assembled:

Attachment 33887

[dogone]

I was practicing a weld with copper back plate. The copper was melted onto the weld and difficult to remove. Is this to be expected or am I doIng something wrong; to hot maybe. Once removed it cleaned up nicely but would be hard to get off while backing in a receiver.

[garthok]

If you start to burn through the copper it will stick, you can try going with thicker copper or let it cool a bit between passes. I am alternating opposite sides and going slow to try and minimize warping and shrinkage. I had burn through issues when I was trying to use brass as a back plate on another project. With my aluminum jig I can wipe off the burn marks, it hasn't melted at all.