Originally Posted by SJ 40
Some say the use of MiMed parts were first used by Glock some time in 07,some say 09. I don't know for sure and I know Glock isn't going to say.
What I do know is by limiting myself to that date,unless the gun has been back to Glock they do not contain MiMed parts.
Such as extractor or locking blocks.
The use of MiMed parts maybe of no consequence to some I would rather not have/use them. So for me I limit my self to 12/06 serial numbers and prior,which is not very limiting to me as all the Glocks I own function with Perfection.
I am slightly amused at people that buy a gun, made by injecting molten plastic, into a form and worry about MIM parts in it. Assuming, Glock's bad extractors are MIM (which I'm not sure anyone knows, positively), They don't work because they aren't the right size or shape. Evidently people can tell they're the wrong size, by eyesight.
Locking Blocks: My old Gen 3 Glocks appear to have some sort of molded locking blocks, in them and never broken one yet. The ones I checked, have a sprue from the mold.