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The Armaspec M-LOK to ARCA Rail bridges the gap between your M-LOK handguard and the growing world of ARCA-Swiss accessories. At just 3 inches long and around 0.7 ounces, this little segment bolts straight onto your M-LOK slots and gives you the industry-standard 38mm dovetail profile that bipods and tripod clamps are built around. If you've been wanting the quick-attach, slide-anywhere convenience of ARCA without buying a whole new handguard or chassis, this is the shortcut.
The big advantage of an ARCA dovetail over a fixed Picatinny lug is placement freedom. Instead of being locked into set cross-slots, you can slide your clamp anywhere along the rail and cinch it down exactly where your balance point wants to be. That matters when you're loading a tripod for a long shot or dropping a bipod low and wide across a barricade. The rail keeps your rifle aligned consistently every time you clamp back on, so you're not fighting your setup between positions.
Armaspec machines this rail from 6061-T6 aircraft-grade aluminum and finishes it in a Mil-Spec Type III hard coat anodize, so it shrugs off the wear and weather that come with real field use. It secures to your M-LOK slots with steel mounting nuts and takes just a few minutes with an Allen key to install. Made in the USA and backed by Armaspec's lifetime warranty, it's the kind of upgrade you bolt on once and forget about.
The compact 3-inch version is the pick when you want a single, dedicated clamping spot without eating up your whole handguard or piling on ounces. It's a natural fit for lightweight hunting ARs and precision rigs where every gram counts but you still want rapid-deploy tripod or bipod stability. If you plan to run a bipod plus a light and extra gear off one continuous rail, the longer options make more sense, but for a clean, minimal setup this one hits the mark.
It uses the standard 38mm ARCA-Swiss dovetail, so it accepts the wide range of ARCA-compatible bipods, tripod clamps, and other gear built to that profile. That includes popular options like Spartan bipods and most ARCA tripod heads. If your accessory clamps onto an ARCA dovetail, it'll ride on this rail.
It bolts directly to the M-LOK slots on your handguard using the included steel mounting nuts and hardware. All you need is an Allen key, and the install takes just a few minutes. Any M-LOK handguard with enough slot space for the 3-inch footprint will work.
Yes, the 3-inch rail gives you a dedicated clamping surface for a single bipod or tripod mount, which is plenty for most setups. If you want to run multiple accessories or slide gear across a wider range, the 6, 9, or 12-inch versions offer more real estate. For a lightweight, minimal build the 3-inch is the go-to.
ARCA lets you slide your clamp anywhere along the rail and lock it exactly where you want, instead of being stuck at fixed Picatinny cross-slots. It also attaches and detaches fast while keeping your rifle aligned the same way every time. That repeatable, adjustable connection is why precision shooters and hunters lean toward ARCA for tripod and bipod work.
| UPC | 810048493753 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARM621-3 |
| Color | Black |
| Length | 5.5000 |
| Model | |
| Product Type | Rail |
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