Optic Mount for Aimpoint COA to SIG P320 Sig-LOC Slide Cut

Description

For shooters who demand a zero-compromise mounting solution for their Aimpoint COA on a SIG P320 with the Sig-LOC optic cut, this mount from Apex delivers a rock-solid foundation. Machined from a single billet of steel and finished with a Black PVD coating, it is built to withstand hard use on duty rigs, competition guns, and serious upgrade builds. The steel construction eliminates flex under recoil, keeping your dot exactly where you left it.

This mount is designed specifically for the SIG Sauer P320 platform with the Sig-LOC optic cut. It fits the P320 Legion, M17, and M18 models (both military and civilian variants), and it works with the factory loaded chamber indicator on the M17/M18. The mount uses the Aimpoint A-Cut geometry to create a precise, repeatable interface between the optic and the slide. The result is a secure, no-slip fit that holds zero through thousands of rounds.

Every screw in the kit comes with a thread locking patch pre-applied. This eliminates the need for liquid thread locker and reduces the chance of screws backing out under heavy use. Torque all Apex screws to 15 in-lb for proper installation. The entire kit is 100% made in the USA.

Key benefits for your build:

• Steel construction: Billet steel mount and clamp resist deformation and maintain rigidity over the life of the firearm.
• Black PVD finish: Durable, low-glare coating that holds up to holster wear and harsh environments.
• Sig-LOC cut compatibility: Direct fit for P320 Legion, M17, M18, and any other SIG with this factory cut pattern.
• Loaded chamber indicator clearance: Works with M17/M18 factory LCI without modification.
• Pre-applied thread locking patch: Consistent, reliable screw retention — no messy liquids required.
• USA-made: Manufactured entirely in the United States with strict quality control.

Specs & fitment:

• Compatible optics: Aimpoint COA
• Compatible slides: SIG Sauer P320 with Sig-LOC optic cut (Legion, M17, M18, and other Sig-LOC models)
• Mount material: Billet steel
• Finish: Black PVD
• Mounting interface: Aimpoint A-C