Middle Atlantic MM3 Series Single Monitor Dynamic Column Mount - MM3-C-120-BK

Middle Atlantic MM3-C-120-BK Single Monitor Dynamic Column Mount

The Middle Atlantic MM3-C-120-BK is a single-display column mount built for control rooms, security operations centers, and AV integration projects where monitor positioning needs to flex without a full redesign. The aluminum construction keeps the assembly lightweight while the 25 lb (11.3 kg) weight capacity covers the full range of commercial flat-panel displays commonly deployed in surveillance and network operations environments.

Overview

The MM3-C-120-BK (often searched as MM3 C 120 BK) ships in a black finish that integrates cleanly with Middle Atlantic rack enclosures and column-based furniture systems. The adjustable height range — 8.82 in at its lowest to 28.82 in at full extension — lets you dial in ergonomic positioning during initial installation and revisit it if the operator configuration changes. Width is fixed at 20.81 in (52.9 cm), which accommodates standard commercial displays without overhanging the column footprint. Depth adjusts from 2.45 to 22.5 in, giving you reach control for operator sight-line management.

Key Features

• 25 lb weight capacity: Handles virtually every commercial monitor up to large-format 32–40 in displays. You won't need to source a heavier-duty mount just because the display swapped out.
• Height adjusts 8.82–28.82 in: A 20-inch vertical range means you can accommodate seated and standing operator positions, or adapt the same mount across different desk heights in a multi-operator suite without replacing hardware.
• Depth range 2.45–22.5 in: Nearly 20 inches of forward/back travel lets you push the display close to the operator or pull it back flush with the column — useful when you need to clear a walkway or reduce glare from overhead lighting.
• Width of 20.81 in (52.9 cm): Sized to fit within a standard column bay without lateral overhang; confirms compatibility with Middle Atlantic's MM3-series furniture column widths before ordering.
• Aluminum construction: Reduces the mount's own contribution to the column load budget while maintaining rigidity under daily positional adjustments. Lighter than steel alternatives at the same capacity rating.
• Mounting hardware included: Arrives ready to install — no need to source metric or proprietary fasteners separately, which matters when you're commissioning a multi-station rollout on a schedule.
• Black finish: Matches Middle Atlantic rack and furniture system finishes; no anodize mismatch in mixed-component installations.
• International availability: Stocked for international shipment, relevant for multi-site enterprise deployments that span US and international facilities.

Integration & Compatibility

The MM3-C-120-BK is designed for use within Middle Atlantic's Middle Atlantic mounting and furniture systems, specifically the MM3 series column platform. Verify your column model accepts this mount variant before ordering — the column's internal rail profile and bay width determine fit. The 25 lb capacity is a hard ceiling; factor in the display weight plus any attached peripherals (document cameras, small speakers) before finalizing. TAA compliance is not applicable to this SKU, so federal procurement officers should confirm project-specific requirements independently. For monitor mounts in high-density operator environments, also evaluate whether a dual-display variant fits the column bay before committing to single-display units across a full build-out.

Frequently Asked Questions

Q: What is the maximum display weight the MM3-C-120-BK can support?

A: The MM3-C-120-BK is rated to 25 lbs (11.3 kg). Factor in the display panel weight only — do not include peripheral accessories hanging off the display.

Q: Is the MM3-C-120-BK TAA compliant?

A: No. The MM3-C-120-BK is not TAA compliant per the manufacturer's published specifications. Federal procurement projects with TAA requirements should evaluate other Middle Atlantic options.

Q: What is the height adjustment range?

A: Height adjusts from 8.82 in (minimum) to 28.82 in (maximum), providing approximately 20 inches of vertical travel for ergonomic positioning.

Q: What material is the mount constructed from?

A: The primary structure is aluminum. The product data also notes plastic components are present in the assembly.

Q: Does the MM3-C-120-BK ship with mounting hardware?

A: Yes, mounting hardware is included in the package.

Q: Is this mount available for international shipment?

A: Yes, the MM3-C-120-BK is flagged as available internationally per manufacturer data.

Jerry Tildsen

The MM3-C-120-BK comes up in almost every SOC or multi-station control room build I spec for Middle Atlantic column furniture. The detail most integrators skip past is the depth range: 2.45 to 22.5 inches of forward travel is genuinely useful when you're managing operator sight lines across a curved console layout — you can push the display forward for the front-row operator and pull back for the second row without swapping the mount.

Technical Highlights:

• 20-inch vertical range (8.82–28.82 in): Covers seated to standing operator positions and accommodates desk height variation across a mixed-furniture suite — no need to source different mount variants per station.
• 25 lb capacity on an aluminum frame: Enough headroom for commercial 32–40 in displays while keeping the mount's own contribution to column load minimal — aluminum construction matters when you're stacking multiple stations on a shared column structure.
• Mounting hardware included: In a multi-station rollout, missing fasteners create real schedule risk. Having hardware in the box removes one sourcing variable on install day.

Deployment Considerations:

• Confirm your Middle Atlantic column model accepts the MM3 series mount rail profile before ordering — the column bay width of 20.81 in is the fit-check dimension, not the display size.
• TAA compliance is not available on this SKU; if you're bidding a federal or government-adjacent project with TAA requirements, flag this early and spec an alternate before the project reaches procurement.

Best fit for commercial security operations centers and enterprise AV integrations built on Middle Atlantic column furniture where operators need repeatable positional adjustments over multi-year deployments.