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

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

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

As low as $135.00
Availability: In stock
Only %1 left
SKU
112-013-C
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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 Lense 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 opic: 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

Older X-5 Slides - These slides have a cut that looks similar to the Sig-Loc cut, but with 2 distinct differences:

- The O.G. slide cut at the front of the mounting geometry in the slide is narrower than those on modern Sig-Loc cut slides

- Mounting Screw Holes are a different thread pitch than most other Sig Slides and we do not have screws to match them

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)

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