Yeah. Mistake on my part.

The FTN is apparently the best but I Form 1’d a Systema Numansky for my AR9 and 300BLK out of ABS. I’m happy with its performance. It requires no extra reinforcement.

My mistake I do have an enclosure but no other mods. I print at 260C hotend temp 95C bed temp.

I've had good success with ABS. Deals with heat better than PLA+ and can be printed on stock Ender 3. Edit: Meant to say PLA+ not CF.