Black 4 mm ModMount spacer shown in an angled top view.

ModMount Spacer

4mm
$14.99
Skip to product information
Black 4 mm ModMount spacer shown in an angled top view.

ModMount Spacer

$14.99
MOD-SPC-4MM

Spacer check: This optional component installs between any ModMount base and optic-side mount. A compatible base and optic-side mount are both required to complete the system.

Spacer Height

Choose 4mm, 6mm, or 8mm of vertical rise.

About This ModMount Spacer

A spacer is an optional component that installs between a ModMount base and optic-side mount. Vertical spacers raise the optic, while the 45-degree offset spacer moves the optic to an angled position.

Every ModMount spacer uses the same oval interface and works with every ModMount base and optic-side mount. Each spacer includes the screws needed for its intended installation. Vertical spacers can be stacked when additional height is needed.

Choose the Correct Spacer

Select a vertical spacer when additional optic height or installation clearance is needed. Select the 45-degree offset spacer when the optic needs an angled mounting position. Confirm the selected height or spacer style before adding it to the cart.

Installation Notes

Seat the spacer in the ModMount base, then seat the optic-side mount in the spacer. Secure the assembly with the included flat-head M4 screws.

Without a spacer, the correct interface-screw length is normally 6mm to 8mm. For a vertical spacer, add the total spacer height to that range. A 4mm spacer requires 10mm-to-12mm screws. When stacking vertical spacers, use their combined height in the calculation.

Attach the optic and check every screw before final assembly. No screw should protrude far enough to contact the firearm or another component. Review the ModMount system guide for component selection and the installation instructions for torque values, screw-length checks, and optional thread locker guidance.

Designed and Manufactured in the USA

Armadyne ModMount spacers are CNC machined from 6061-T6 aluminum in our Lincoln, Nebraska shop, then sandblasted and finished with H-Series Cerakote for wear and corrosion resistance.

Warranty and Returns

Armadyne stands behind the mounts and components we manufacture. Review our warranty and returns information for support, exchanges, and discretionary return terms.

Choose Your ModMount Base

Select the base that matches your firearm receiver, Picatinny rail, or dovetail. A base is required to complete the ModMount system.

Choose Your Optic-Side Mount

Select the mount that matches your optic's footprint. This component is required to complete the ModMount system.