Apex Optic Mount for FNX-45 – ACRO/MPS* Optics

Description

The Apex Optic Mount for FNX-45 – ACRO/MPS* Optics is a steel billet plate that bolts directly to your factory FNX-45 Tactical slide, giving you a rock-solid base for closed-emitter pistol dots like the Aimpoint ACRO P-1/P-2, Steiner MPS, or Lead & Steel Pandora PB-3. At $60, it’s a no-nonsense way to ditch the factory plastic plate and get a steel interface that won’t walk loose under heavy use.

Manufacturer	Apex Tactical Specialties
Model	Apex Optic Mount for FNX-45 – ACRO/MPS* Optics
Material	Billet steel, black oxide finish (per manufacturer specs)
Compatibility	FNX-45 Tactical models with factory optic cut only
Finish	Black oxide
Weight	~0.8 oz (per manufacturer specs)
Condition	New

Key Features

• Steel billet construction – Why it matters: The factory plate is polymer; a steel plate eliminates flex and keeps your zero locked in under recoil or if the gun takes a hard knock.
• Black oxide finish – Why it matters: Corrosion resistance and a low-glare surface that won’t reflect light when you’re in a dark room or behind cover.
• Direct factory slide mount – Why it matters: No slide milling required – just remove the factory plate, drop this in, torque the included screws, and you’re ready to run.
• Closed-emitter optic compatibility – Why it matters: ACRO, MPS, and Pandora optics keep debris, rain, and mud off the lens – a must for a duty or survival pistol that might get dropped in dirt.

Who It’s For

This mount is for FNX-45 Tactical owners who want to ditch the factory plastic optic plate and run a rugged closed-emitter dot. If you’re setting up a nightstand gun, a truck gun, or a backup for three-gun matches, this is the piece that keeps your Aimpoint ACRO or Steiner MPS planted where it belongs.

Pros & Cons

• Pro: Steel construction at a price that’s half of some aluminum plates – $60 is a steal for a machined steel mount.
• Pro: Includes mounting screws – no hunting for the right thread pitch.
• Con: Fits FNX-45 Tactical models only – won’t work on standard FNX-45 or FNS slides.

Comparison

Feature	Apex Optic Mount	Zev Technologies FNX-45 RMR Plate	Agency Arms FNX-45 Optic Plate
Material	Billet steel	7075-T6 aluminum	416 stainless steel
Finish	Black oxide	Type III hard anodized	Black nitride
Optic footprint	ACRO/MPS/Pandora	RMR/Holosun 507C	RMR/Holosun 507C
Price	$60	$85	$95
Weight	~0.8 oz	~0.5 oz	~0.7 oz

FAQ

Will this mount work on a standard FNX-45 (non-Tactical)?

No. This mount is designed specifically for FNX-45 Tactical models that have the factory optic cut. Standard FNX-45 slides lack the necessary cut and recoil boss.

Does it come with mounting screws?

Yes, the necessary screws for attaching the mount to the slide are included. You will still need the screws that came with your optic to attach the optic to the mount.

Will the Steiner MPS fit without modification?

The MPS will physically mount, but Apex recommends using their Super Clamp to ensure adequate clamping force because the MPS body is slightly narrower than the ACRO. Without the Super Clamp, the mount may not grip the optic securely.

Can I use this mount with a suppressor-height front sight?

Yes. The mount is low-profile enough that you can co-witness with factory suppressor-height sights on the FNX-45 Tactical.

✓ Nationwide delivery – ships to all 50 states
✓ Ships in 1-2 business days from our warehouse
✓ 30-day returns – no restocking fee on unused items
✓ Secure checkout – encrypted payment processing

FN Parts & Accessories | Optic Mounts & Plates | Apex Tactical

Last updated: April 2026