Release image
51 2
Author thumbnail

Carrier Keeper V1 - AR-15/CMMG Conversion Bolt Case

@ZeroMojoro Remixable Design License with Commercial Physical Use Allowed 4.8MiB Updated September 9, 2025, 11:07 PM Released September 9, 2025, 2:27 PM 0.001LBC 0 Reposts
A simple case for storing a standard AR-15/M-16 Bolt Carrier Group or a CMMG-Style conversion bolt (with 556 collar)

The Carrier Keeper is designed to be an easy-to-print solution for storing a standard AR-15/M-16 bolt carrier group or a CMMG-Style conversion bolt.

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.

It is designed to be compatible with a standard AR-15/M-16 bolt carrier group, or with a CMMG-style conversion bolt with either a 556 collar or a dedicated 22lr collar.

The design features a simple screw-top interface for securing the keeper to the cap.

It can be printed on most printers (231.5mm max height) with the filament of your choice. No supports should be necessary, although a brim is highly recommended for some components.

Update - Version 1 Release Candidate C =========
Added 3 specific size variations of the keeper tube

1. The AR-15 sized version fits a standard AR-15/M-16 BCG or a Conversion Bolt with a 22 collar

2. The Conversion 22 version only fits a Conversion bolt with a 22 collar

3. The Conversion 556 fits all platforms including an AR-15/M-16, Conversion Bolt with 22 collar or Conversion Bolt with 556 collar




LBRY Tags: 3d2a; 3d print; ar-15; gun; ar-22