If you own a Steiner MPS and want to mount it on a wider range of slides or adapter plates, the super clamp for Steiner MPS optic from Apex is the budget-smart upgrade you need. For just $20, this steel clamp replaces the factory part and expands your mounting options to any dovetail or optic cut made to the Aimpoint ACRO spec. No more fighting with limited compatibility—just a solid, repeatable lock-up.
| Manufacturer | Apex |
|---|---|
| Model | Super Clamp for Steiner MPS Optic |
| Material | Steel (per manufacturer specs) |
| Compatibility | Steiner MPS, any ACRO-spec dovetail mount |
| Finish | Black oxide |
| Weight | 0.3 oz (approx., per manufacturer specs) |
| Condition | New |
Key Features
- Expanded Clamping Range – Why it matters: The factory clamp only works with the MPS’s narrow groove; this clamp lets you mount it on any ACRO-spec dovetail, including aftermarket slides and plates from companies like Zev and Agency Arms.
- Steel Construction – Why it matters: Steel holds torque better than aluminum or polymer, so your optic stays zeroed under recoil. No creeping or loosening after a few range trips.
- Black Oxide Finish – Why it matters: Adds corrosion resistance and reduces glare, keeping the clamp low-profile on a carry or competition gun.
- Direct Replacement – Why it matters: Swaps in minutes with the same screws and torque specs (15–20 in-lb per Steiner). No gunsmithing, no extra parts.
- Cost-Effective Fix – Why it matters: Instead of buying a new optic or adapter plate, you spend $20 and use the mounts you already have. That’s a 90–95% savings vs. replacing the whole optic.
Who It’s For
This clamp is for Steiner MPS owners who want to use their optic on a slide cut for an Aimpoint ACRO—common on Glock, Sig, and CZ platforms. It’s also ideal for budget-minded shooters who don’t want to drop another $400 on a second optic just to swap between guns. If you’ve got a dovetail mount or aftermarket slide that’s ACRO-spec, this clamp makes it work.
Pros and Cons
- Pros: Affordable, steel build, expands compatibility, easy install, low weight.
- Cons: Only works with Steiner MPS (not other optics); black oxide can wear on the clamping surfaces over time if over-torqued. Per Steiner specs, keep torque between 15 and 20 in-lb to avoid stripping.
Comparison
| Feature | Apex Super Clamp | Zev Technologies ACRO Plate | Agency Arms AOS Plate |
|---|---|---|---|
| Price | $20 | $60 | $85 |
| Material | Steel, black oxide | 7075 aluminum, anodized | Steel, nitride |
| Compatibility | Steiner MPS only | RMR, ACRO, DPP (depends on plate) | ACRO, RMR (multi-optic) |
| Installation | Direct swap, no tools needed | Requires filing or fitting on some slides | Requires slide modification |
| Weight | 0.3 oz | 0.5 oz | 0.7 oz |
| Best For | Budget MPS owners seeking ACRO compatibility | Shooters with multiple optic formats | Competition builds needing a robust mount |
If you only need to mount a Steiner MPS on an ACRO cut, the Apex Super Clamp saves you $40–65 over plate systems that add complexity. The Zev and Agency options are better if you plan to swap between different optic brands, but for a dedicated MPS, this clamp is the smarter value.
FAQ
Does this clamp work with all Steiner MPS models?
Yes, it fits every Steiner MPS (standard or the newer models). The clamping interface is identical across the line.
Will it fit my Glock MOS slide with an ACRO plate?
If the plate is cut to Aimpoint ACRO specs (most aftermarket plates from CHPWS, FCD, etc.), yes. The clamp expands the MPS’s groove to match that footprint.
Do I need to use thread locker on the screws?
Steiner doesn’t specify it, but a drop of blue Loctite (242) is common practice. Just don’t exceed 20 in-lb torque.
Is this clamp reversible?
Yes. You can swap back to the factory clamp anytime. The Super Clamp uses the same screws and doesn’t modify the optic.
Ready to Upgrade Your Steiner MPS?
Save money and gain flexibility with the Apex Super Clamp. It’s a small part that solves a big compatibility problem for just $20. Order now and get it shipped to your door.
✅ Nationwide delivery (all 50 states)
✅ Ships 1-2 business days
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Explore related gear: Optics Mounts | Steiner MPS Accessories | Budget Gun Parts
Last updated: April 2026
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