This is a gridfinity tray to fit any of the rivet guns that comes with the “737” kit from the Yardstore and maybe the Aircraft Tool Supply rivet guns. I need to verify that though. I modeled it specifically for my 4X gun but all the other sizes share the same handle. The only difference is the barrel length. 

A large cut-out is provided for the tip of the barrel so a spring can be mounted on the gun while it is stored. I keep my quick-release spring mounted and I leave the honey-comb spring the the tray. 

It also has storage for the two bucking bars that come with the kit. 

I have a Snap-On ATI634T bucking bar that also has a slot in the tray. If you do not have this bucking bar, pick the "V2_No Tungsten" version.

Be warned this model uses a lot of filament unfortunately… around 350g depending on what type of infill you do. 

Below are my settings

Printer: Bambu X1 Carbon

Material: PLA or PETG

Layer Height: 0.20mm

Infill: Grid, 8-10% 

Walls: 2 

Top Layers: 3 

Print Time: 7hrs on standard print settings with a 0.6mm nozzle