There’s a reason, several actually, but first the welding.
Having fixed a 51 recently, anything I can’t build with hand tools and a vise is out.
The G3 has a lot of attributes, but having had a real H&K, not enough.

The , 223 cartridge is secondary, when I build the AR it will be a 6.8 or .300BO.
Here .223 is legal up to deer with 60 gr bullets, and as this will be a hunting and defense gun primarily, including elk, ill pass on the .223 until I finish the training upper.

I have a wood G1 stock right here.
I would stil use the SA long stock,it fits.
And I’ll do another Rhodie, that babypoo color really works.

I wish they were more boring, people keep having to have them.