Apex Optic Mount for ACRO/MPS* - Sig P320 -R2 Slide Cut including M17 / M18 Models
*We highly recommend using the Apex Super Clamp to expand the clamping range of your MPS optic
- Aimpoint® Acro™ P-1 & P-2
- Steiner MPS
- Lead & Steel Pandora PB-3
The Apex Optic Mount is designed to securely mount the below listed optics to the slide of the Sig Sauer P320 Legion, P320 M17/M18, and other models featuring the -R2 slide cut. The Apex Optic Mount comes either with or without an integrated rear sight. The integrated rear sight in front of the optic also acts as a gas shield to keep class cleaner longer.
Optics compatible with this mount:
The Apex Optic Mount with integrated rear sight for the R2 slide cut is set up to co-witness in the bottom 25% of the optic window. Requires a tall front sight for co-witness. Two different sight height packages are available. Select option based on barrel length.
- Designed to fit the slide of the Sig Sauer P320 with an R2 slide cut
- Works with models equipped with the factory Loaded Chamber Indicator
- Sights regulated for POA=POI at 15 yds with 124 gr. NATO ammunition (applies to optic mounts with integrated rear sight only)
For Use In These Guns
Works on the Sig Sauer pistols with a rev2 (-R2) slide cut, including the P320 XFIVE Legion, P320-M17, P320-M18, P320 XFULL, P320 XCARRY, P320 XCOMPACT, and P320 XVTAC
- Any Sig P320 pistol with "-R2" in the SKU *EXCLUDING the AGX models
Part# 112-009: Does not include integrated rear sight and will fit any P320 pistol with R2 slide cut.
Part# 112-009-RS-357: Includes integrated rear sight in front of the optic and accompanying front sight(.357" blade height). Select this option for P320 models with a 5.0” barrel (i.e. Legion).
Part# 112-009-RS-373: Includes integrated rear sight in front of the optic and accompanying front sight(.373" blade height). Select this option for P320 models with a 4.7” or shorter barrel (i.e. M17 or M18).
Part# 112-019-RS-357: Includes integrated rear sight behind the optic and accompanying front sight(.357" blade height). Select this option for P320 models with a 5.0” barrel (i.e. Legion).
Part# 112-019-RS-373: Includes integrated rear sight behind the optic and accompanying front sight(.373" blade height). Select this option for P320 models with a 4.7” or shorter barrel (i.e. M17 or M18).
Does Not Fit These Guns
Not for use in the Sig Sauer P320 models with RX or RX Pro (RXP) slide cuts.
Not for use in the Sig Sauer P320 AGX models (uses RX Pro cut).
See parts 112-011 and 112-012 for models with RX or RX pro slide cuts.
1 ea. Apex Optic Mount for the ACRO, MPS*, or PB-3 Optics
2 ea. Mounting Screws - Thread Locking Patch pre-applied (torque to 20 in-lb only)
1 ea. Tall Front Sight (applies to options with integrated rear sight only)
How to Prep Your Slide to Mount an Optic
Products to Consider
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APEX Preorder Policy
Placing a preorder allows you to "get in line" and reserve your product: the quickest way to acquire an out of stock item.
Preorders are charged when the order is placed and shipped as soon as the product is available. Our regular return policy applies, with the 60 day return policy starting from shipment date. See our Policies page for full details here