Apex Optic Mount for ACRO/MPS* – Sig P320 RX and RX Pro

Description

This Apex Optic Mount is built for shooters who run their Sig P320 hard. Whether you are on the clock at a match or carrying a duty rig, this mount provides a stable, repeatable zero for your enclosed emitter optic. Machined from a single billet of steel and finished with a black oxide coating, it resists corrosion and holds up to the recoil impulse of repeated firing cycles.

The mount is specifically designed for the Sig Sauer P320 slide that has the RX Classic cut or the RX Pro cut. It directly replaces the factory optic plate, giving you a dedicated platform for the toughest miniature red dots on the market. The critical design feature is the integrated Optic Sub Plate. This plate allows the Acro locking bar to fully engage the mount body, preventing the optic from shifting or walking under heavy use. You get a solid lock-up that stays tight round after round.

Compatible optics include:

• Aimpoint Acro P-1 & P-2
• Steiner MPS
• Lead & Steel Pandora PB-3

Key benefits for your setup:

• Steel construction: Steel is harder than aluminum. This mount does not deform under the clamping pressure of the optic or the slide. You get a rigid interface that maintains zero.
• Full engagement: The locking bar on the Acro/MPS style optics catches the sub plate completely. This eliminates the gap that can cause the optic to rock or shear screws.
• Works with factory loaded chamber indicator: No need to modify your slide or remove the LCI. The mount is cut to clear this feature on your RX or RX Pro slide.
• Low profile: Keeps the optic close to the bore axis for a more natural sight picture and faster transitions between targets.

Fitment notes: This mount is model-specific. It is designed for the P320 with the original RX Classic cut or the RX Pro cut. If your P320 has the newer rev2 slide cut (identified by “-R2” in the SKU), you need part #112-009 instead. Confirm your slide cut before ordering to avoid returns.

At $75, this mount offers a direct upgrade path for serious shooters who need a bombproof interface. No shims, no adapters, no guesswork. Just a steel mount that locks your optic down for the long haul.