Super Clamp for Steiner MPS Optic

About this product

The Break Point Armory Super Clamp for Steiner MPS Optic is a precision-machined steel replacement clamp engineered to expand mounting compatibility for Steiner MPS optics across all ACRO-spec dovetail mounts. This component addresses the factory clamp's limited tolerance range by providing a wider clamping surface that maintains zero under recoil. It serves as a direct upgrade for competitive shooters and duty users who require absolute mounting reliability across multiple firearm platforms.

What is the Super Clamp for Steiner MPS Optic used for?

The Super Clamp enables secure mounting of Steiner MPS optics on any firearm slide cut to Aimpoint ACRO specifications, including aftermarket plates and direct milled slides. It replaces the factory clamp which may not fully engage slides at the outer tolerance limits of the ACRO standard, particularly on slides measuring between 0.984" and 1.024" in dovetail width. This ensures consistent mounting pressure across the entire ACRO tolerance range without compromising optic alignment.

How does the Super Clamp compare to the factory Steiner clamp?

The Break Point Armory Super Clamp provides 30% wider clamping surface contact than the factory Steiner MPS clamp, distributing recoil forces more effectively across the optic housing. While the factory clamp functions adequately within narrow tolerance ranges, our clamp maintains consistent 15-20 in-lb torque retention across the full ACRO specification spread from 0.984" to 1.024". The factory clamp demonstrates occasional slippage at the extreme ends of this range, particularly after 500+ rounds of 9mm major competition loads.

What does it weigh and what are the dimensions?

The Super Clamp weighs 14.2 grams and measures 0.375" in height, 0.625" in width, and 1.125" in length—identical footprint dimensions to the factory clamp it replaces. This weight represents a 3.1-gram increase over the factory aluminum clamp due to its 4140 steel construction, adding minimal mass while significantly improving clamping force distribution. The black oxide finish maintains a consistent 0.0005" thickness for corrosion resistance without affecting dimensional tolerances.

Who is this NOT for?

This clamp is unnecessary for users whose slides measure within the core ACRO specification range of 1.000" to 1.010" where the factory clamp performs adequately. It provides no benefit for optics mounted on non-ACRO pattern slides such as Doctor or RMR cuts, nor does it convert the MPS to other mounting standards. Users seeking lightweight builds should note the 3.1-gram weight increase over the factory aluminum clamp, though this represents less than 1% of total optic system weight.

What's in the box?

The package includes one precision-machined 4140 steel Super Clamp with black oxide finish, one Grade 8 fastening screw torqued to 15 in-lb at factory, and installation instructions specifying proper torque sequence. Unlike some aftermarket clamps, it does not include thread locker or additional hardware, as the factory Steiner screw provides optimal engagement with the clamp's threads. The clamp arrives ready for installation with no additional finishing required, similar to our 1911 Ejector Pin Fixture in its drop-in functionality.

Is the Super Clamp worth it at $20?

At $20, the Super Clamp delivers measurable performance improvement for users operating at the tolerance limits of ACRO-spec mounts or frequently moving optics between multiple slides. The cost represents approximately 5% of the optic's value while eliminating potential zero shift issues that could cost significantly more in competition penalties or sighting re-zero time. For users with single-slide setups within core tolerances, the factory clamp remains sufficient, but for those building multiple platforms like our Action Enhancement Kit for CZ P-10, this clamp provides essential compatibility assurance.