Someone recently turned me on to a new weird PETG-GF that is supposed to be very impact resistant and very affordable. I'm always interested in new materials, especially those that are cheap and easy to print in.

I use this "UFA compliant compact striker fired artillery boi" platform for material tests. If it's built well in PLA+, they will take a solid diet of high velocity 22lr with a standard printed breech.

This has been the best one of these I have built so far. I have ran shorts, standard velocity, high velocity, stingers, and interceptors. Extracts flawlessly. No signs of wear at all.

I'll take it out and run the hell out of it within the next couple of weeks.

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[–] [S] 3 points 7 months ago

People get real wild with the filament stuff for sure. I have one of these same builds in matte PLA, and PLA-F. My Modelo has silk PLA and normal PLA parts on it that are all original 2000 rounds later.

I don't recommend people use these weird materials, but I like to put it out there for everyone just as another data point.

My barrel nut for my 21.5" m4gery is this same PETG-GF and it's been working great. I broke my PLA+ barrel nut.

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