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Posted: 3/16/2015 1:44:50 PM EDT
Well, stopped at the gunshow and picked up this hunk of steel. I believe it to be an 80 percent M1 Garand receiver. I have unlimited access to a large machine shop, can anyone give me the heads up to what kind of project this could be?
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| I have it in the shop right now, just waiting to find some prints and I'm diving in! I have a heat treating company that we have done business with before, hopefully I can work out a deal with them once the machine work is done. They have proved to be amazing in the past. |
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Who made it?
What do you know of the pedigree of the steel from which it is made, anything at all? What heat treatment has it seen already? Is it a reject due to imperfections? The blueprints are in a sticky at the top of the forum. - Link to sticky thread Once in the sticky thread, you'll have to follow the link to images of the receiver blueprint. They are not imbedded in the sticky thread. |
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I have no information on it. That's why I posted it here. I bought it as a cool paperweight, but if I can put some nice equipment to work and build a rifle, then awesome! If it is destined to be a paperweight, then so be it. I'm not sure of what it all needs, I do know it needs to be heat treated once complete, and I can get that done.
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This is definitely not an 80%, it's definitely much further along than that. Probably a reject.
Garand receivers are so complicated, I don't think anyone would or could ever bring an 80% receiver to market. The only only thing I can see that it needs for operation is receiver threads. |
| I haven't spent much time really looking at it, but it seems that other than getting some of the slag and or mold marks ground down, and the barrel threads, there really isn't a whole lot that needs work. I haven't found much for information really. I also haven't spent much time really digging either. I did find the heat treat information in that link. I will find out more on that when I speak with the company that would handle that work for me. That is, if I should even spend any time on this project at all. I don't want to build a bomb, just a cool rifle similar to my Grandfathers gun he carried in WWII. Maybe add a nicer stock, barrel, and trigger too. |
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Quoted:
Looks like a tough build. I can do it, I just need to find out if it is even safe to use this casting before I start putting time in. You are catching on. Metallurgical assay Surface hardness test (may already have been heat treated) Radiographic inspection for internal defects Magnaflux inspection for surface cracks Why was it parkerized? If it passes muster, you'll likely need fabricated specialized tooling to make all the cuts and jigs to hold it while you make them. I wouldn't just call it a hobby project. I'd call it a tour de force. |
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Quoted:
Well, stopped at the gunshow and picked up this hunk of steel. I believe it to be an 80 percent M1 Garand receiver. I have unlimited access to a large machine shop, can anyone give me the heads up to what kind of project this could be? <a href="http://s188.photobucket.com/user/jray00343657/media/20150315_225928_zpscwehrxjs.jpg.html" target="_blank">http://i188.photobucket.com/albums/z183/jray00343657/20150315_225928_zpscwehrxjs.jpg</a> <a href="http://s188.photobucket.com/user/jray00343657/media/20150315_225917_zpschdas3wo.jpg.html" target="_blank">http://i188.photobucket.com/albums/z183/jray00343657/20150315_225917_zpschdas3wo.jpg</a> Is it just me, or is the channel for the mag follower warped? |
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I would venture this is what you have. http://www.gunauction.com/buy/11459887# GunParts acquired a bunch of "left-overs" and sold them off as paper-weights. IIRC they were about 20-25 bucks apiece (I bought 2). Comparison with a real Garand receiver will show you what needs to be done... ETA ----- they were supposed to be 8620 steel |
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Quoted:
You are catching on. Metallurgical assay XRF, OES, Sparks Spectrometer, these would be helpful in determing the elements present in the part. Surface hardness test (may already have been heat treated) You can rent a MIC-10, or MIC-20, or something similar and get the hardness. Radiographic inspection for internal defects Call an NDT company, they can shoot it for you. Understand that RT will be better at finding volumetric defects as opposed to planar discontinuities. This part would require several shots and would be a bitch to select the correct IQI. Magnaflux inspection for surface cracks I would recommend using a wet method, not dry powder. Black and white or flourescent...doesn't really matter, both are very sensitive, if it's there they'll see it. Why was it parkerized? If it passes muster, you'll likely need fabricated specialized tooling to make all the cuts and jigs to hold it while you make them. I wouldn't just call it a hobby project. I'd call it a tour de force. Quoted:
Quoted:
Looks like a tough build. I can do it, I just need to find out if it is even safe to use this casting before I start putting time in. You are catching on. Metallurgical assay XRF, OES, Sparks Spectrometer, these would be helpful in determing the elements present in the part. Surface hardness test (may already have been heat treated) You can rent a MIC-10, or MIC-20, or something similar and get the hardness. Radiographic inspection for internal defects Call an NDT company, they can shoot it for you. Understand that RT will be better at finding volumetric defects as opposed to planar discontinuities. This part would require several shots and would be a bitch to select the correct IQI. Magnaflux inspection for surface cracks I would recommend using a wet method, not dry powder. Black and white or flourescent...doesn't really matter, both are very sensitive, if it's there they'll see it. Why was it parkerized? If it passes muster, you'll likely need fabricated specialized tooling to make all the cuts and jigs to hold it while you make them. I wouldn't just call it a hobby project. I'd call it a tour de force. |
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