I’m really loving Polymaker PA612-CF right now. Prints beautifully after a proper drying.
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I’m a couple days away from a live fire test on my MP22K, so I’ll chime in when I do. Mine will hand cycle and extract/eject ok at the moment, but it def took some work to get the bolt and ejector to cycle smoothly together without hang ups due to this laminated design. The issue I’m having right now is the recoil spring - I’m already shorter than the specified length and yet I can get the cocking handle into the locked open position. I’m just short a couple mm. I’m just going to keep shortening it until it will, but that will of course reduce bolt closing force. I’m not big on the design not having a rebound stop other than the spring itself. Seems like it will pound itself to destruction over time. Shrug. We’ll see.
I ordered the stainless G19 gen3 rails and am very happy with them. I put them in a G45 gen3 frame file I printed from his downloads and they fit like a glove. Just waiting for my slide now.
I’ve ordered a couple times from him and although not Amazon Prime delivery times I got them in a week or so. Pretty sure it’s just a guy running a side gig.



Well that’s def odd because I ordered on 31-OCT, the day the part was restocked and got it a week later. If you ordered before me and the part was shown as in-stock, that’s a different story. I don’t think it will let you order if the part is shown out of stock.