Originally Posted by 1biggun
NICE WORK ON THE 50 CAL..
HOW WAS IT HARDNED/ TEMPERED????
ANY CHANCE OF YOU MAKING AN SELLING A 80% TYPE RECIVER AN POSSABLY A BOLT HEAD???????
I HAVE A COMMERCIAL 50 BMG BARREL SITTING HERE OFF A VULCAN ARMS BOLT ACTION THAT WAS TURNED INTO A BIG BORE SHOT GUN I THINK.
I HAVE BALKED AT BUILDING A RECIVER FOR FEAR OF BEING SURE OF THE TEMPERING.
ID LOVE TO SEE SOME SIMPLE BARREL EXTENSIONS AN BOLT HEADS THAT WOULD ALLOW A TUBE BUILD RIFLE. ONLY THE BOLTHEAD AN A BARREL EXTENSIN NUT WITH LUGS WOULD BE NEEDED AN ONLY THEY WOULD NEED TO BE TEMPERED AN MADE OF GOOD STEEL.
It was made from 4140ht (prehardend) 2" stock. In fact the only piece I did NOT make from 4140ht was the cocking piece (O-1). 4140ht is readily available in many areas AND from a few reputable dealers on the web.
I never considered doing an "80%" because of the time involved in EDMing the action. By the way, I hate the term "80%". It is either a firearm or it is not. There is no "80%" firearm.
The bolt heads are not a big deal... I was going to do a couple of "blanks" 100% on the mill and see how they come out. The would have to be faced and cut for the cartridge on a lathe to insure that they are properly centered... Although the bolt heads in the first pic are NOT completed... And the second picture is farther than I would take them if I were to sell them...
I had never thought about doing a barrel extension... It would not be THAT hard to do.... A barrel extension and or bolt head would not require a determination letter. The question would be how to join the barrel extension to the action... It could be silver soldered with proper use of heat paste but you would not want to weld 4140 without proper stress relieving and heat treating. Rivet to tubing like an AK???
I supose if there were interest... I would have to think about that...
Now look what you started.