Used Filaments.ca's ASA filament and the print came out good. Fitment as mint in my ASG AUG Commando. I did had to reshape the mag release lever for smoother reloads, extending the angle of the latch to allow the mag to go in and removing some material on the corner that still stuck out in the mag well. Also I had to redo the feeding lip as it didn't extend 1-2mm far enough to release the bb's from my mag. (Maple Armouries Midcaps). Afterward the adapter work flawlessly.