The CHP SIG P320 RX/PRO/AXG adapter for Holosun K Series optics bridges the gap between your SIG pistol's factory optic cut and modern compact red dot technology. If you've got a P320 RX, P320 Pro, or P320 AXG and want to run a Holosun 407K or 507K, this precision-machined plate handles the conversion cleanly—no gunsmithing, no guesswork. C&H Precision Weapons manufactures these adapters in their Georgia shop using tight-tolerance CNC machining and stainless steel hardware, so you're getting a domestic-made solution built to last.

The adapter is machined from 6061 aluminum, a proven material for optic mounting that balances rigidity with weight. Every plate is quality-checked before it ships, so you can trust the fit and function out of the box. Whether you're upgrading an older RX-equipped P320 or swapping glass on a Pro or AXG model, this adapter lets you leverage the proven Holosun K-series ecosystem—two of the most reliable compact dots in the game.

Installation is straightforward: the adapter replaces your existing optic plate and positions the Holosun K-series sight in the correct relationship to your P320's slide and frame. All fasteners are stainless steel, so corrosion isn't a concern even if you're carrying or training hard.

Key Features

• Converts SIG P320 RX, P320 Pro, and P320 AXG to Holosun 407K/507K mounting
• Precision CNC-machined 6061 aluminum construction
• Stainless steel mounting hardware resists corrosion
• Made in the USA by a family-owned manufacturer
• Quality-checked before shipment

Specifications

Material	6061 Aluminum with Stainless Steel Hardware
Compatibility	SIG P320 RX, P320 Pro, P320 AXG
Optic Platform	Holosun 407K / 507K
Manufacturer	C&H Precision Weapons (USA)

Frequently Asked Questions

Will this adapter work with my P320 RX and a Holosun 407K?

Yes. The CHP adapter is designed specifically to convert the P320 RX optic cut to accept Holosun 407K and 507K sights.

Can I use this on a P320 Pro or AXG frame?

Yes. This adapter is compatible with the P320 Pro and P320 AXG in addition to the RX model.

What comes in the box?

The product description confirms you receive the precision-machined aluminum adapter plate and stainless steel mounting hardware. Contact Bosque Outdoors for details on any additional components or documentation included.

Is this made in the USA?

Yes. The adapter is manufactured in Coastal Georgia and machined on HAAS CNC equipment by C&H Precision Weapons, a family-owned business.