this post was submitted on 22 Oct 2025
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Re-posting since this didn't make it into the Ark content.

Re-Introducing my first contribution to FOSSCAD – The Carrier Keeper. I've been a big watcher/consumer and felt inspired to contribute. I learned Solidworks and created a series of simple printable storage cases for an AR-15 BCG, 22-conversion BCG and Dedicated 22-lr BCG.

Firearm components often become dirty when used or gooey when cleaned and lubed. The Carrier Keeper provides a simple place to store a full bolt carrier group. It helps keep your range bag clean and your bolt-carrier group protected.

There are 3 files to allow you to choose your desired size and use case.

Find it on https://odysee.com/@ZeroMojoro:2/CarrierKeeper-V1

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[–] chickenf622@sh.itjust.works 2 points 1 month ago (2 children)

As a person that doesn't own a gun is, is it often that you're taking the bolt carrier group out of a gun when you're not cleaning it? I would think you would just leave it in the gun and take it out when you're cleaning it.

[–] ZeroMojoro@fosscad.io 3 points 1 month ago (1 children)

Pretty common to have a standard AR-15 BCG and also carry a separate "Conversion" bolt that allows you to shoot 22lr rounds out of a 556/223 caliber rifle.

[–] chickenf622@sh.itjust.works 1 points 1 month ago

Oh I was thinking it was a .22 LR conversion not .223. That makes way more sense

[–] baseadaptbeard@fosscad.io 2 points 1 month ago

Often you have multiple bolt carrier groups (BCGs) some perform different functions.

For example, the lower BCG you see in the attached image is specifically designed to accept a completely different calibre bullet.