This is a loading funnel that clips on a Daisy brand Red Ryder BB gun (youth or adult), allowing one-handed BB loading.

I have a Red Ryder BB gun, which has an awkward method of loading BBs. I wanted to design a clip-on BB loading funnel. Before starting that process, I did a search and found the original design by PMC9609. It looked like it would save me some design time. It works well, but I found two main issues:

1. The perpendicular to the barrel funnel design of the original model makes it so that the gun is generally somewhat parallel to the ground when loading, which requires one to tilt-up the barrel a bit and to jiggle the it to help the BBs to not clog the entry port.

2. The 2-piece design is nice, because it eliminated the need for printing supports, but gluing the two parts together can be tricky, in terms of alignment, and especially in achieving a good bond. I made the mistake of using a gel CA glue, which takes a while to set. After holding the pieces together for too long, and trying to make sure the parts were aligned, while applying continuous pressure, I was left with a weak bond that was easily broken.

So, I modified the original design to address these issues.

The 45 degree funnel allows the BBs to fall into the barrel, usually with no clogs or shaking. The BBs can be loaded by resting the barrel against the inside of one's leg, while sitting in a chair, or when in the field, kneeling with one knee up and one down. The process was simple. I was able to take some of the the attached photos and a video while holding the camera/phone in my right hand and pouring BBs with my left hand (not my dominant hand).

I resolved the gluing issue by designing in the post and socket connection point. It works well. Before gluing, check the fit to make sure that the two parts fit flush against each other, with no unwanted printing debris getting in the way. Then put glue on one part at the connection point and face, and push the parts together. The post and socket design ensures proper alignment (see attached photos if you have a question about alignment). This design also makes it so that there is no chance of gluing the two parts together in the wrong orientation. The bond is much stronger than the original design.

I printed with 100% infill, which is my general practice for all tools and accessories that I plan on using for a long time. I also printed with a brim because I had some trouble with the clip coming off of the print bed and being transformed into a glob of spaghetti. The brim helped keep things in place.