My interpretation of the Westar-35 Mandalorian Blaster Pistol as seen in s2e3 of The Mandalorian wielded by Bo-Katan and her crew.
The model is in about 8 parts and includes a working trigger, provided you have an aproxx 1inch diameter elastic band and a 3mm Dowel. The parts all fit together, the For-end, Barrel, Receiver, and Trigger guard are meant to be glued together once you've finished filing/sanding and paint prep.
There are two magazine plates included, one is a simple flat bottom that can be glued in place and the other has a hole for a countersunk screw if you would like to be able to remove it for a battery or something.
The slide simply slides onto the receiver from behind and over a part of the for-end. You can glue it in place or leave it friction fit or drill some holes for a set screw or something, it seems to stay in place just fine with a friction fit so I left it at that.
The trigger group is assembled by sticking a 3mm dowel through the hole in the trigger, I find FDM printing small pins like that to be a waste of time as their dimensional accuracy is horendous so I did not include one. In the receiver there are a few bulges from the sides, one has a cresent in the front, place your trigger pin there and glue it in place, above and behind that in the same bulge is a slot for the brace, this is for the trigger to rest against, behind that are two hooks on either side, loop your elastic around them and then around the trigger.
Hope you enjoy, the model is hollow if you are so inclined there should be room inside for a small electronic setup to make it make blaster sounds and lights.
Update: when printed on my printer the z axis tolerances were perfect between the slide and receiver, when printed on a freinds computer they were interfereing. I have added a receiver and slide loose version. You should be able to use a combination of loose or regular or all lose to get the tolerance you need.