Apex Optic Mount for Holosun 509T to Sig P320 RX PRO Cut

Description

This Apex Optic Mount is a direct-fit solution for mounting your Holosun 509T to a Sig Sauer P320 slide with the factory RX Pro cut. Machined from a solid billet of steel and finished with a durable black oxide coating, this mount provides a rock-solid platform for your optic without adding unnecessary bulk. It’s built to hold zero through thousands of rounds, whether you’re running drills at the range, carrying concealed, or hunting in rough terrain.

Key benefits for your build:

• Direct fit for RX Pro cut slides: This mount is specifically engineered for the Sig Sauer P320 slide that already has the RX Pro optic cut. No adapter plates or modifications needed—just bolt it on and zero it.
• Compatibility with M17, M18, and Legion slides: If you’ve got one of these factory-cut models, this mount drops right in. It also works with slides that have the factory Loaded Chamber Indicator (LCI), so you don’t lose that feature.
• Steel construction for real-world use: Unlike aluminum mounts that can flex or strip under heavy recoil, this one is machined from steel. That means a more secure hold on your 509T, less chance of screws backing out, and a mount that lasts as long as your pistol.
• Low-profile design: Keeps the optic close to the slide for a natural sight picture and minimal snag risk. Ideal for concealed carry where every millimeter counts.

Specs and fitment at a glance:

• Optic compatibility: Holosun 509T (all versions)
• Slide compatibility: Sig Sauer P320 with RX Pro cut (including M17, M18, Legion models)
• Material: Billet steel
• Finish: Black oxide (corrosion-resistant, low-glare)
• Price: $65
• Category: Sig Sauer > Optics Mounts

Why this matters for you:

If you’re running a P320 for practical shooting, hunting, or daily carry, you need gear that works without fuss. This mount eliminates the guesswork—it’s designed for a specific slide cut and a specific optic, so you’re not chasing compatibility issues. The steel body gives you confidence that your 509T isn’t going anywhere, even after thousands of rounds. And at $65, it’s a straightforward upgrade that pays for itself in reliability. Whether you’