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The ARCA Rail M-Lok 120 mm is a compact adapter machined from a single piece of aluminum, designed for rapid and secure attachment of firearms to tripods, bipods, and shooting rests featuring the ARCA-Swiss mounting standard. The modular system allows direct installation onto M-Lok handguards, providing exceptional mounting rigidity with minimal added front-end weight.
We Are a Team of Veterans
We view the ARCA Rail M-Lok 120 mm as an essential component for establishing a stable shooting position during extended observation or engagement from unsupported platforms. Unlike traditional Picatinny rails, the ARCA-Swiss profile enables smooth fore-and-aft positional adjustments along the sight axis and immediate lockup via a lever-clamp, saving critical seconds during position changes. The hard-anodized 7075 aluminum structure provides structural integrity when handling heavy recoil impulses while preserving thread life under hard field use.
Technical Specifications
| Parameter | Value |
| Firearm Compatibility | AR, AK, M4A1, PKM, other platforms |
| Manufacturer | Gun Power Nation |
| Country of Origin | Ukraine |
| Mounting Interface | M-LOK |
| Rail Standard | ARCA-Swiss |
| Material | 7075 Aluminum Alloy |
| Finish | Hardcoat Anodizing, Cerakote |
| Dimensions, mm | 120×38×12.8 |
| Weight, g | 70 |
Commentary / Comments
The primary engineering advantage of the ARCA Rail M-Lok 120 mm lies in its 7075 aluminum alloy construction combined with a Cerakote and hardcoat anodized finish. This ensures maximum resistance to abrasion, corrosion, and impact damage in harsh operational environments. The 120 mm length offers an optimal compromise between clamp surface area for tripod heads and available real estate on the handguard for additional accessories.
Direct attachment to the M-Lok slots eliminates the need for stacking adapters, reducing overall height over bore and minimizing leverage applied during recoil. The unit is engineered for full compatibility across diverse weapon platforms—ranging from lightweight carbines to heavy PKM machine guns—where rock-solid support on tripod mounts is mandatory.
Target Audience / Suitable For
Designated marksmen, snipers, and fire support operators engaging targets from static or prepared positions gain the ability to rapidly lock and unlock their primary weapon onto a tripod without tools. The ARCA-Swiss geometry allows smooth fine-tuning of the center-of-gravity depending on attached thermal optics or suppressors, maintaining proper balance during long observation shifts. The heavy-duty 7075 material withstands severe recoil forces from full-power cartridges without deforming the host handguard's M-Lok slots. A anti-reflective Cerakote coating prevents signature reflections and protects against environmental degradation and cleaning solvents.
Machine gun crews utilizing PKM platforms requiring rigid interface options for specialized bipods or tripod mounts receive a heavy-duty base capable of withstanding sustained automatic fire. The compact 120 mm profile permits forward mounting near the muzzle without obstructing lateral M-Lok slots reserved for weapon lights or infrared aiming devices.
Firearms instructors and tactical operators training positional shooting from barricades can utilize this rail to build versatile training setups on AR or AK rifle systems. The standardized M-Lok interface allows quick migration of the mounting plate between primary and secondary weapon platforms based on mission requirements.
Precision rifle competitors (PRS/ELR) gain a reliable, low-profile interface for rapid transitions along barricade bags and tripod heads, designed so that the flat rail profile does not interfere with a traditional hand grip when firing offhand.