Apex Tactical Mount Holoson 509T to SIG P320 with SIG-LOC Optic Cut

Apex Tactical Mount Holosun 509T to SIG P320 with SIG-LOC Optic Cut

Details:

This Apex Optic Mount is designed to securely mount the Holosun 509T to the slide of the Sig Sauer P320 Legion, P320 M17/M18 and other models featuring the Sig-LOC optic cut. It is machined from a billet of steel and Black Oxide finished.

The fully integrated rear sight in front of the optic acts as a gas shield to keep your optic glass cleaner longer and saves labor from needing to install a rear sight.

The integrated rear sight is setup to co-witness in the bottom 25% of the optic window. Requires a tall front sight for co-witness(Included). Two different sight height packages available. Select option based on barrel length (see below). 

The rear sight behind/after optic versions include a blast deflector that is not visible through the optic.

If you’re looking for this optic mount without backup iron sights, you can find it here: Apex 112-018-PRO. 

Expected Results: 

• Designed to fit the slide of the Sig Sauer P320 with a SIG-LOC optic cut.
• Cleaner optic glass due to the sight/blast deflector between the optic and breech
• Works with the M17/M18 models with the factory Loaded Chamber Indicator 
• Securely mounts the Holosun 509T to the slide
• Thread Locking Patch pre-applied to screws (torque to 20 in-lb) 
• Sights regulated for POA=POI at 10 yds with 115 Gr. Ammunition

Key Feature:

• Both optic mounts include a gas shield, intended to keep your optic Objective Lens cleaner than it would be without the deflector.
  • BUIS in front of the optic: The Base of the BUIS is used as the gas shield.
  • BUIS behind the optic: The block sticking up in front of the optic is the gas shield.

For Use In These Guns

Works on the Sig Sauer pistols with a SIG-LOC optic cut including the P320 XFIVE Legion, P320-M17, P320-M18, P320 XFULL, P320 XCARRY, P320 XCOMPACT, and P320 XVTAC 

BUIS in Front/Before Optic: 

- BUIS in front of Optic; Choose 112-013-RS-450 for 4.7” or shorter barrels, such as the “M17/M18” Series pistols

- BUIS in front of Optic; Choose 112-013-RS-434 for the 5.0” barrel lengths, such as the Legion 

BUIS Behind/After Optic: 

- BUIS Behind Optic; Choose 112-320-RS-450 for 4.7” or shorter barrels, such as the “M17/M18” Series pistols

- BUIS Behind Optic; Choose 112-320-RS-434 for the 5.0” barrel lengths, such as the Legion

Does Not Fit These Guns

• P200 Series slides
• RX Classic Cut slides
• RX-Pro Cut Slides

What's Included:

• Apex Optic Mounting Plate with BUIS in front of or behind the optic. (Choose your Rear sight location in the pull down menu)
• Optic Mount Screws with Pre-Applied Thread Locker
• Front sight regulated to your barrel length (Choose your sight height by selecting your barrel length)