It is a trigger guard for Beretta APX A1 Carry (AA1C). Although AA1C comes with a self defense trigger with a decent trigger weight to prevent it from accidentally going off, I carry mine in pocket and designed this to block the trigger from going off accidentally by snagging on something in my pocket while carrying. 

I have other guns and some have a safety and some not so decided to standardize on having a trigger guard as a manual safety for all of them to have same safety drill. Simple design created in Tinkercad. 

Print Details

• Filament - PLA, PETG or PLA+
• Infill -  Anything above 20%  would work
• Resolution - 0.2 mm (anything up to 0.4mm is fine). 
• Supports - None. 
• Others - Ironing enabled. This was done to get a smoother top layer finish. Increases the time but gives a much better result at resolutions of .2 or higher.