u/RXARMS

What's up guys, just showing a small clip of our up coming RX Arms Beretta A300 Ultima Patrol Compatible QD Side Saddle Shell Carrier. This is a patent pending design that we have been working on for over a year now.

This one is showcased on the Beretta A300 UP, with the mounting plate having cutouts that keep the exterior receiver pins on the A300 exposed. Also compatible with many other platforms like the Benelli M4, Beretta 1301, Mossberg 590/500/Maverick 88, Remington 870, Keltec KSG to name a few. We have printable template that you can print off and see if it works with your receiver if your gun is not listed above.

Hope you guys dig it, we plan on having these available in the fall 2026. If you feel like keeping up with the release of this you can signup on the waitlist on the product page.

Let me know if you have any questions at all I'd be happy to respond!

What's up everyone, excited to share some footage of our patent pending Beretta 1301 compatible QD Side Saddle Shell Carrier system. This one has been under development for over a year now.

We utilize high glass content, high performance, impact resistant injection mould body. The mounting plate is 7075-T6 premium aluminum, same with the latch button which is also made from 7075-T6. mounting plate attaches to receiver via 3M VHB Adhesive.

Let me know if you have any questions, would be happy to answer! Hopefully these will be available in the fall 2026.

A little video showing the RX Arms Patent pending QD side saddle shell carrier system running on a Benelli M4.

Good day everyone. I am moving towards releasing an M4 SBS heat shield variant.

If you are interested in such a thing, please visit this page and sign up on the wait list. It will help me gauge interest in the project, still in the prototyping stage. I appreciate your time!

Rx Arms Benelli M4 Heat Shield 14" Entry SBS