I got tired of nearly losing the small pieces of this laser boresight and the rubber band around the carefully opened bubble package it came in was not doing the job anymore...so I designed a custom case. I started with someone elses knurled tube case, but I can't remember the original design or designer so apologies to that guy, but I drastically changed it.

Main case holds the boresighter unit without any caliber attachment.
It has a rotating sleeve with 8 labeled positions/pockets labeled for the included OEM gauge/caliber size attachments:
-Closed
-LR44 (spare batteries)
-12-20 Gauge
-.440-.50 Cal.
-.338- .357 Cal.
-.270-.320 Cal.
-.220-.250 Cal.
-0.17 Cal.

The pockets are somewhat generously sized for the attachments and all the small pockets are about the same size so it may work with other brands of boresighter. This one was designed around a Center Point brand model CPLBS1745. I imagine this is a generic design repackaged by multiple vendors.

Three main pieces...body, cap, and sleeve.

1. Print the sleeve first (maybe both versions)

2. When you print the body you must insert a pause (that moves the print head completely out of the way) at the layer or two just before the narrowed part of the body returns to the full diameter knurled section. The sleeve channel is about 1mm taller/wider than the sleeve itself fyi. You will slide the sleeve into place during this pause with the detent knob at the top to ride in the channel and catch on the ramps over each position.

3. Print the cap whenever, doesn't matter.

oh yeah and part 4. A 3ea LR44 spacer/holder that should fit in the LR44 pocket with batteries. FYI I have not tested this as I designed it afterwards, but my temp battery spacer worked fine which was...I just cut around the LR44 bubble pack very close on one battery and placed it between two others (this boresight uses 3 LR44 batteries). So this part is optional. You can keep 3 spares in the LR44 pocket, or take the batteries out of the device in between uses and store them in the LR44 pocket.

The version 1 sleeve position/detent protrusion was a hair less snug than I wanted so you may print both the v1 and v1.2 versions prior to the body and if you have good bed adhesion you should be able to try both before resuming the print after pause. The v1 version is working fine and dandy on mine, it just doesn't lock into position as firmly as I like.

All was printed in PLA and kudos to whoever designed that original knurled tube as those threads fit very snug at first and perfect after worked in a few cycles.

As for the clear material on the sleeve, it's kind of helpful, not really necessary though.
If you go clear on the sleeve a lighter color body helps you see if the various caliber attachment pockets are empty or full.

All changes from the original knurled tube case were done in Tinkercad. I could tell I was pushing the limits of a browser-based CAD tool with this, but it worked.

Please no commercial printing or sales of this. Please post your makes, and enjoy.

Necessity is the Mother Of All Invention.