Aimpoint Spacer Extension

• Forward Extension Design: Moves the sight 40 mm farther forward, creating extra rail space and helping achieve a more comfortable sight position on rifles with busy top rails.
• 39 mm Optical Axis Height: Raises the optical axis from 30 to 39 mm, which supports a higher mounting position that can improve head posture and alignment with compatible setups.
• CompM4 Mounting Standard: Built around the Aimpoint CompM4 interface, so it integrates cleanly with matching mounts and keeps the installation straightforward.
• Aluminium Construction: The aluminium body keeps weight reasonable while providing the rigidity needed for a stable red dot sight mounting solution.
• Broad Aimpoint Compatibility: Designed for Comp M4 / M4s and also usable with Comp M3 / ML3 and PRO optics when paired with the appropriate Base and Top Ring, giving more flexibility across existing Aimpoint setups.

About the Aimpoint Mounts Series

Aimpoint Mounts are built to give Aimpoint red dot sights the correct height, position and interface for different rifles and mounting standards. Within the company’s lineup, this series supports both straightforward fixed installations and more adaptable configurations for users who need quick-detach capability, co-witness height options or a different fore-aft sight position. The range includes solutions for Picatinny rails and other interfaces, making it relevant to hunting optics, sport shooting and professional rifle setups alike.

A practical strength of the series is its modular approach. Aimpoint offers mounts and related components that let the same sight family be adapted to different rifles and shooting styles without changing the optic itself. Some models focus on rapid removal and return-to-zero handling, while others prioritize a simple, low-profile installation. Across the series, the design philosophy is consistent: secure fit, repeatable positioning and compatibility with established Aimpoint sight footprints. That makes the Aimpoint Mounts family especially useful for shooters who want to tailor red dot sight height and placement to their rifle, cheek weld and accessory layout.

About the Aimpoint Spacer Extension

The Aimpoint Spacer Extension is a specialized mounting accessory for shooters who need to reposition a compatible Aimpoint sight without changing the basic mounting standard. Its defining feature is the ability to raise the optical axis from 30 to 39 mm while also moving the sight 40 mm forward. In practice, that combination is useful on rifles where rail space is shared with magnifiers, backup sights or night vision accessories, or where a more forward sight position gives a cleaner and less cramped setup.

Because it uses the Aimpoint CompM4 mounting standard, this spacer is intended to integrate with matching Aimpoint mounting solutions rather than act as a generic adapter. The forward extension changes sight placement in a purposeful way: it can help balance the rifle’s top-rail layout, free up room around the receiver and support a more natural head position depending on stock geometry and other mounted equipment. The aluminium construction keeps the unit robust without adding unnecessary bulk, and at 100.00 g it remains manageable as part of a complete red dot sight mounting system.

This spacer is particularly relevant for Comp M4 / M4s users, and it can also be used with Comp M3 / ML3 and PRO optics when combined with the appropriate Base and Top Ring. That makes it a practical option for users standardizing several Aimpoint-compatible rifle setups around a familiar mounting geometry.

About Aimpoint

Aimpoint AB was founded in February 1975 in Malmö, Sweden, and the company is closely associated with the development of modern red dot sight technology. Aimpoint Electronic, introduced in 1975, was the world’s first commercial red dot sight, establishing the company’s long-standing focus on non-magnifying aiming systems.

Today, Aimpoint specializes in red dot sights for hunting, sport shooting and professional users. Its product range includes compact Micro models, the Acro pistol sight series and larger Comp-pattern optics, along with the mounts and accessories needed to adapt those sights to different firearms. This concentration on red dot systems has given Aimpoint a strong reputation for practical, purpose-built sighting equipment and compatible mounting solutions designed around real rifle and handgun use.

Main Features

• Manufacturer: Aimpoint
• Mount series: Aimpoint Mounts
• Made in: Sweden
• Mounting standard: Aimpoint CompM4
• Color: Black
• Material: Aluminium
• Weight: 100.00 g
• Compatibility above: Aimpoint CompM4 Mounting Standard
• Compatibility below: Aimpoint CompM4 Mounting Standard

Warranty

2 years. Aimpoint states a two-year warranty period for this spacer extension.

In the Box

• Spacer Extension
• Screws
• Allen key