AR Sponsor
Posted: 9/16/2013 6:39:59 AM EDT
| Has anyone had any experience with light weight magnesium lower recievers? PSA has one on sale and i was thinking about using it for my next build (dedicated .22lr). thanks. |
|
Quoted:
forged magnesium wheels are stronger and lighter than Al ones. With that said, the wear in a receiver may make me a little nervous if it were Mg filings. How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? |
|
Quoted:
How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? Quoted:
Quoted:
forged magnesium wheels are stronger and lighter than Al ones. With that said, the wear in a receiver may make me a little nervous if it were Mg filings. How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? I've considered using a 3D printer to build lost wax patterns for casting magnesium lowers. A VW engine case with pounded out bearing saddles probably has enough material for half a dozen. |
|
Quoted:
How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? Quoted:
Quoted:
forged magnesium wheels are stronger and lighter than Al ones. With that said, the wear in a receiver may make me a little nervous if it were Mg filings. How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? Well that instills a lot of confidence. 
Chevy Vega's had aluminum blocks. |
|
Quoted:
Well that instills a lot of confidence.
Chevy Vega's had aluminum blocks. Quoted:
Quoted:
Quoted:
forged magnesium wheels are stronger and lighter than Al ones. With that said, the wear in a receiver may make me a little nervous if it were Mg filings. How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? Well that instills a lot of confidence.
Chevy Vega's had aluminum blocks. Yup VW blocks used to be magnesium, and they make one hell of a bright fire when you through one into a bon fire. |
|
Quoted:
You do realize that VW made engine blocks out of magnesium, right? I assume that you also realize the wear parts in those magnesium blocks are steel (piston sleeves, crank shaft bearings). I can't imagine anyone using magnesium for something that would encounter wear. Not just because it burns, but because it has shitty durability against wear. |
|
Quoted:
I assume that you also realize the wear parts in those magnesium blocks are steel (piston sleeves, crank shaft bearings). I can't imagine anyone using magnesium for something that would encounter wear. Not just because it burns, but because it has shitty durability against wear. Quoted:
Quoted:
You do realize that VW made engine blocks out of magnesium, right? I assume that you also realize the wear parts in those magnesium blocks are steel (piston sleeves, crank shaft bearings). I can't imagine anyone using magnesium for something that would encounter wear. Not just because it burns, but because it has shitty durability against wear. Back to my question. How many of you have worn out a lower? Seriously? 
|
| so, it sounds like the few people who have actually used a magnesium lower had no issues? I have zero concern with the flamability issues. I have several lower recievers that i have shot a lot, and not only are they not worn, but the anodizing isn't even worn through yet. If there is enough heat to ignite anything in the lower reciever, then you have a much bigger problem already. |
|
Quoted:
I assume that you also realize the wear parts in those magnesium blocks are steel (piston sleeves, crank shaft bearings). I can't imagine anyone using magnesium for something that would encounter wear. Not just because it burns, but because it has shitty durability against wear. Quoted:
Quoted:
You do realize that VW made engine blocks out of magnesium, right? I assume that you also realize the wear parts in those magnesium blocks are steel (piston sleeves, crank shaft bearings). I can't imagine anyone using magnesium for something that would encounter wear. Not just because it burns, but because it has shitty durability against wear. Bearings are thing steel shells with babbit metal filler, just like every other plain bearing. Well, some are also aluminum, but since the crank actually rides on an oil film, bearings aren't precisely considered a "wear" item. Cylinders are cast iron, not steel. You need to brush up on your metallurgy. |
|
Quoted:
Well that instills a lot of confidence.
Chevy Vega's had aluminum blocks. Quoted:
Quoted:
Quoted:
forged magnesium wheels are stronger and lighter than Al ones. With that said, the wear in a receiver may make me a little nervous if it were Mg filings. How many of your aluminum receivers have been used so roughly that they were reduced to flammable filings? You do realize that VW made engine blocks out of magnesium, right? Well that instills a lot of confidence.
Chevy Vega's had aluminum blocks. The Vega used an aluminum block with Nikasil treated bores, where the nickel and silicon were precipitated out of the aluminum to provide a wear surface for the piston rings. Or *supposed* to provide a wear surface. Mercedes Benz, Porsche, and BMW all used Nikasil aluminum cylinder bores with no problem; the Vega's problem wasn't the base metal of the block but shitty GM quality control. But I repeat myself. |
|
Quoted:
so, it sounds like the few people who have actually used a magnesium lower had no issues? I have zero concern with the flamability issues. I have several lower recievers that i have shot a lot, and not only are they not worn, but the anodizing isn't even worn through yet. If there is enough heat to ignite anything in the lower reciever, then you have a much bigger problem already. The autoignition point of Magnesium is 883F, but that only really applies to powder or filings, since larger pieces conduct heat away from a point ignition source. Setting a magnesium lower on fire while using it is effectively impossible - the shooter would have 2nd degree burns on his hands long before the metal got hot enough. Unless the shooter was the target of a flame thrower. THAT would set a magnesium lower on fire, though I think the shooter would have other things on his mind. Like napalm. |
|
Ive built three Mag Tactical magnesium lowers.
First one went together great. Stuck it on a 7.62x39 upper. Few hundred rounds later, and no problems or abnormal wear. Although they are just painted not anodized, and the paint comes off real easy. Second lower went great on a 6lb. 5.56mm. Third had many machining problems. Main problem was the safety detent hole was off, causing the safety to not engage properly. I am in the process of returning it. |
AR Sponsor