Just finished putting together my Digital Nimbus Invader PDW. The frame, arm brace and few other pieces are printed in Esun PLA+. The design was originally intended for a Glock 17L upper, but all I have on hand is my G24 upper. We will see how well the frame holds up to the extra punishment. This project was printed on a lightly modified Creality Ender 3 Pro. If your interested in printing your own, Digital Nimbus sells the brace hardware on his website at a very reasonable price. You can also use a G34 or G17 slide with this, it just won’t be flush with the end of the frame.