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My 3D printed receiver

timeout said:
He's in New Zealand. It will take ATF a bit of time to get there.
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Flash News: Two ATF agents just boarded a Luxury cruise liner headed for New Zealand! Stop. May take a while to get there. Stop. The ship makes ports of call at Hawaii, Bali and Australia before hitting New Zealand. Stop.
 
hey guys, thanks all for the compliments. yes, first of all, i am in new zealand and we are a very gun-friendly-country. i just need my A-CAT license to make one and don't even need to bother with serial numbers on it even with some AR's.
well, related to accuracy of the print, imagine if you could "inflate" the whole receiver to its normals (engineers know what I am talking about) to .003" evenly. example, the outside i have designed is 1.4" and it came out exactly at 1.403". the designed boltway is .690" and it came out .687". i haven't noticed any warping. threads are rough, really! interior and exterior roughness are really good though, probably because of the way it's been printed: upside down (must have gone thru tumbling afterwards). I will have to run some taps and single point cut tenon threads to clean them up.
i should have asked how long it took to be printed but imagine a 20 micron layers to reach 7" tall. it's metal, 15-5 ph. coming week I will age harden and then final machine it.
printer is EOS270 metal laser sintering machine. stated yield and tensile strength similar to investment casting (surely companies will always feather their own nest). i will come back here to show you the progress if i don't get killed :D. price for one of those machines are 5 figures, but i am 99,99% sure that in 5 or 7 years this technology will be readily available to anyone.
the image attached is when it was very hot literally just out of the printer with support still attached.
cheers!
mfg

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EOS Calls it "Additive Manufacturing". Much different then the Plastic Layering Extruders know more commonly as 3D Printers here in the $400 - $1,000 price range.

Bob
 
people said:
The is no need to put a sn on your home made firearms.
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that's not exactly correct somewhere in the mid 90's the atf required all actions mfg'd must have serial #and city and state where mfg'd I built a few in that era and called about it being they were for my own use wanted to know how or where to register. there was not a good simple answer as they only keep records if you are a manufacturer magic number under 50 per year and that is only for taxes. so I was told yes you need a serial # and markings as to where made but no where to register. a serial # is a pretty good idea anyway if you are ever stopped on the way to a match or range they can get kind of funny about a firearm with no serial # and you might have a very bad day...George
 
geo.ulrich said:
that's not exactly correct somewhere in the mid 90's the atf required all actions mfg'd must have serial #and city and state where mfg'd I built a few in that era and called about it being they were for my own use wanted to know how or where to register. there was not a good simple answer as they only keep records if you are a manufacturer magic number under 50 per year and that is only for taxes. so I was told yes you need a serial # and markings as to where made but no where to register. a serial # is a pretty good idea anyway if you are ever stopped on the way to a match or range they can get kind of funny about a firearm with no serial # and you might have a very bad day...George
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Most doing it fail to accept that they are not immortal. Once the builder of a non serialized gun dies, that firearm becomes a serious problem, to whomever may have it in their possession. The whole concept is rather silly as the numbers on my firearms cause me no grief.
 
TRA said:
Most doing it fail to accept that they are not immortal. Once the builder of a non serialized gun dies, that firearm becomes a serious problem, to whomever may have it in their possession. The whole concept is rather silly as the numbers on my firearms cause me no grief.
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I think it look great. I want to know who is going to proof test it . Larry
 
I also noticed that DAG0001 was engraved. Which could always be used as a serial number if needed. So though it wasn't needed, it was added.
 
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