Originally Posted by fivefourfiveX39
All in all, if your going to make your own weapons then you should make them yourself not contract them to a third party because it is "CHEAPER" to manufacture solution! Everybody loves what they have because it's theirs and they cherish it so naturally there going to defend it from bias and criticism I'm just trying to give some insight into what certain weapon materials are used to manufacture guns. Most UMAREX guns use ZAMAK-2 which is the hardest of them as there is different ZAMAK strengths #2, 3, 4, 5 and 7 are the qualities. ZAMAK-2 has Brinell strength if 130 and decreases as it ages to @ 80-85 Brinell it's shear strength is about 35,000 PSI so it can more than withstand the .22lr but I just prefer aluminum 7075-T6 used in my slide, but hey man the S&W 22 is a beautiful gun and I'm shure you will have tons of fun with it all I wanted to do before it became a huge argument was to tell you some specs now that you have them do with them what you will just trying to help you out on the different .22 pistols enjoy your firearms brother.
Not really wanting to be anti here, but you seem to be a chicken little - running around saying the sky is falling. You seem to to trying to talk about things you don't really understand or know anything about - for the purpose of - what ? As one poster remarked - to make someone feel bad - or a bunch of someones.
One - Ruger does not specify their slide material - only that it is "aerospace aluminum" - not some specific like 7075 T6 aluminum - as you stated. You cannot know what Ruger's precise slide material is.
Two - Smith and Wesson gives their slide material of Their M&P22 as "aerospace aluminum". Sounds the same as Ruger's to me. No mention of a "Zamak". And Zamak is not an aerospace aluminum. So you have accused Smith and Wesson improperly.
Three - Your description of "Zamak" is confused - indicating that you do not understand material properties.
- Material hardness is measured in Brinell units.
- Brinell has nothing to do with strength.
- Your "look-up of Zamak shear strength is incorrect - it is 46k psi not 35k psi.
- How do you judge that 35k psi is sufficient for 22LR? This has no meaning without knowing specifics of the mechanical design. Where is shear important? What are the dimensions?
- Did you know that your 7075 T6 Al material has a shear strength of 48k psi? That is, for all practical purposes, the same as the mysterious Zamak material shear strength you are concerned about. But you say your 7075 is better. Why is it better? What is your design concern?
Four - Where is your Zamak information on all these guns coming from - it's not in the M&P22? What's with this concern?
Five - Why do you care what your slide material is made of - aluminum or any other material, for that matter? Why are you second guessing the designers of these high quality guns?
As far as concern of other companies making pistols - add the Singer Sewing Machine company to those which made Colt 1911's for the U. S. Army.
Most companies buy products made to their specifications from other companies.
Is the sky falling?
Or is it just to make people feel bad?
There are some people here that actually are engineers...