This model was developed by Captain Slug and reposted as permitted by his CC-BY-NC license.

The Caliburn is a beauty, but its butt leaves a lot to be desired. This adjustable stock adds some thiccness to your sickness while improving the ergonomics.

In addition to letting you dial in the length-of-pull, this stock offers a wider badonkadonk buttplate and a wider, comfier cheek weld.

This replaces the parts BackButtR and BackButtS from the Caliburn. I strongly recommend printing AButtPlate from TPU or TPE, and the other parts from PETG or another tough material.

In addition to the base hardware, you'll need three 1-3/4" or longer #10 screws and three #10 nuts. Note that the screws are NOT included with the base Caliburn hardware kit, nor Slug's Bag-o-Bits.

The instructions are a bit outdated but still get the message across: http://captainslug.com/nerf/Caliburn%20AStock.pdf

To adjust, loosen all three screws until the butt has the distance you desire. Then, tighten the top screw until it jams in position.