MBR Rimfire Accessories Collection

This series is a set of custom 3D-printed rimfire accessories I designed for use with my Bergara B14R. The goal was to create practical, functional kit that also looks clean and cohesive, with matching hex pattern detailing and my MBR logo throughout.

Current designs include:

• AICS Magazine Holder – Tek-Lok compatible, adjustable fit using a resizing insert. 
• Chamber Flag – Clear chamber indicator, featuring the same hex styling and a lanyard loop for easy handling and visibility.
• Control Bridge for MDT Chassis – designed to fit ACC Elite, ACC Premier GEN2, and LSS Gen 3 Competition forends.

All models are designed with real-world use in mind — easy to print, sturdy, and with just enough style to make your gear stand out.

More designs to come in the future.
 

This is a custom chamber flag following the same hex pattern and logo theme as my other parts. It’s a simple but effective way to show clear when your rifle is not in use.
 

The flag features a rounded insert tab, along with a couple of holes for attaching some elastic cord to hold your bolt securely against the chamber flag and a keyring so it is impossible to miss. I printed mine in PLA at 0.16 mm layer height, which came out strong and clean.

It’s lightweight, easy to spot, and adds a touch of personal style to range safety gear.

Use up to 4mm elastic cord, ideally also in a bright colour, to help stop the bolt moving and the chamber flag from potentially falling out. 4mm is a squeeze but its what I used in my photos.