ALP Boresight Holder for Laser Alignment

thingiverse

Author: [Flonase on RDForum.org](https://www.rdforum.org/index.php?members/14732/) Public forum post on RDForum.org: [Boresight Holder for Laser Alignment](https://www.rdforum.org/index.php?threads/93602/) "I printed a boresight holder for the ALP brackets. It worked great, but I didn't have enough adjustment on my setup to get my mounts to horizontal. Rather than wait for next spring when I finish the job, I thought I'd share at least the parts in case anyone else wanted to use them. The idea is that you put a boresight laser into the holder, snap the holder into the ALP bracket, and then adjust the bracket so that it is straight and level by watching where the targeting laser is pointing. Pictures are probably better than words for explaining this. Here's the CAD render of the first design (I have a second one that uses less plastic and prints faster, will share that too at the end): ... The holder is designed for this [Sightmark 9mm boresight laser](https://www.amazon.com/gp/product/B001C3S736/?tag=rdf0cd0c-20). I sized the holder for the 9mm version. They come with some fairly cheap batteries. It's worth having replacements on hand. The 9mm ones use [size 393 batteries](https://www.amazon.com/gp/product/B002UG1B0U/?tag=rdf0cd0c-20). For the laser sight holder STL files attached to this post, v03 is the block one and v05 is the one that is open in the center."