Thanks, I have also been thinking of different ways to attach the upper to the lower magwell. still plenty of options to optimize that (and the mag catch mechanism). but for now, the goal of this prototype is to get it functional, not perfect.
Will optimize it closer to perfect after it works well. It is easy to get bogged down in perfecting details early on, but that just usually slows the project down. the connection is functional, that is what matters at this point in the design process.
Still have to finish the ejector design and then I can print the rest of the parts. after that, will start cutting some metal.
That material is protopasta High temp carbon fiber PLA. I looks very similar to carbon fiber nylon, but it is cheaper and easier to print, and super stiff. But some sort of more durable Nylon is planned for the final product.
