Description
The stock magazine release on a Sig P320 gets the job done, but if you shoot a lot or run drills, the reach can start to feel like a compromise. This Rival Arms extended release fixes that. It gives your thumb a little more real estate to work with while keeping a slim enough profile that you are not going to be dumping mags by accident when the gun rides in a holster or against your body.
What the Rival Arms P320 Release Brings to the Table
The whole thing is CNC-machined from a single piece of billet aluminum and finished in a hard black anodize, so it holds up to daily handling without wearing thin. Rival Arms designed it at what they call an optimal length and angle, and the idea is simple: get your thumb on the button quicker without adding so much material that it becomes a snag point. The exposed face carries a grooved texture too, which gives your thumb a positive bite when you hit it under speed or with sweaty hands.
Installing the Extended Mag Release on Your Sig P320
One of the better things about this catch is that it drops right in. Single-piece construction means fewer parts to fuss with, and no gunsmith is required to get it running. It also ships with a new magazine release spring in the box, so you are not scavenging for the old one or ordering a spring separately. Plan on a basic swap using your existing catch stop, and you will be back together in a few minutes.
Fit and Compatibility Notes
This release is built for the Sig P320 platform chambered in 9mm, covering full-size and carry grip modules along with common variants like the X-Carry. If you picked up a bare grip module without a release, this piece gives you what you need to get it functional. It carries a black anodized finish that blends right in with a factory pistol, and Rival Arms backs its parts with a limited lifetime warranty for peace of mind down the road.
Key Specifications
- Manufacturer: Rival Arms
- Manufacturer Part Number: RA72S001A
- Model: Magazine Release
- UPC: 788130030349
- Fitment: Sig Sauer P320 (Full Size and Carry, 9mm)
- Material: CNC-Machined Billet Aluminum
- Finish: Black Hard Anodized
- Face Texture: Grooved for positive engagement
- Construction: Single-piece
- Installation: Drop-in, no gunsmith required
- Country of Origin: Made in the USA
- Warranty: Limited Lifetime
What’s Included
- Rival Arms extended magazine release for Sig P320
- New magazine release spring
Frequently Asked Questions
Will the Rival Arms RA72S001A fit my Sig P320?
It is made for Sig P320 pistols chambered in 9mm, covering full-size and carry grip modules along with common variants like the X-Carry. It reuses your factory catch stop, so it works with standard P320 grip modules. If you bought a bare grip module without a release, this gives you the parts needed to make it functional.
Do I need a gunsmith to install this extended mag release?
No gunsmith is required. The single-piece design drops in using your existing catch stop, and it comes with a fresh magazine release spring in the box. Most people can complete the swap in a few minutes with basic hand tools.
What is the release made of and how is it finished?
It is CNC-machined from a single piece of billet aluminum and finished in a hard black anodize. That combination keeps it lightweight while standing up to daily handling and holster wear. The black finish blends in cleanly with a factory Sig P320.
How is this different from the stock P320 magazine release?
It sits at a longer, more comfortable angle than the factory button so your thumb reaches it faster during reloads. The slimmer profile helps cut down on accidental mag drops, and the grooved face gives you a more positive press under speed.





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