KJI Arcatinny Mount Adapter
Arca rail or adapter · 3 oz · $80
Arca-Swiss
A dovetail rail and clamp standard for tripod heads. A rail or plate on the rifle slides into an Arca clamp on the head and locks with a knob or lever, so the rifle goes on and off the tripod in seconds.
- A Arca-Swiss or Picatinny clamp end
- B M-LOK rail mount
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Heads whose clamp takes it (calculated)
This is an Arca dovetail, so it fits any head with an Arca clamp. The heads on this site that have one:
HOG Saddle TH-1.4 Turtle Head with K-Clamp · KJI Nomad Ball Head · KJI Pathfinder Inverted Ball Head · KJI Reaper Rail System, Arca-Swiss · KJI Titan Inverted Ball Head · Leofoto LH-36 · Leofoto LH-40 · Leofoto LH-55LSC Camo · Leofoto YB-75LRC Leveling Head · NightSnipe Leveling Head · NightSnipe NS67 V2 Low Profile Ball Head · Sunwayfoto XB-60 · Tricer AK Ball Head · Tricer DH Ball Head · Two Vets 55mm Dual Tension Ball Head, ARCALOCK Dual Clamp · Two Vets 65mm Dual Tension Ball Head, ARCALOCK Dual Clamp
Specs
| Type | |
|---|---|
| Type Arca-Swiss A dovetail rail and clamp standard for tripod heads. A rail or plate on the rifle slides into an Arca clamp on the head and locks with a knob or lever, so the rifle goes on and off the tripod in seconds. | Arca rail or adapter |
| Mounts to | |
| Base 3/8-16 and 1/4-20 threads The two screw sizes tripods use. 3/8-16 (3/8 inch, 16 threads per inch) holds heads on shooting tripods; 1/4-20 is the smaller camera thread, used for accessories and light gear. | Fits Arca-Swiss or Picatinny clamps (the Reaper Rails and other Arca or Picatinny tripod heads) |
| Base is an Arca dovetail Arca-Swiss A dovetail rail and clamp standard for tripod heads. A rail or plate on the rifle slides into an Arca clamp on the head and locks with a knob or lever, so the rifle goes on and off the tripod in seconds. | Yes |
| Holds | |
| Top | Bolts to an M-LOK rail on an AR or bolt-action rifle |
| Fits on the rifle | M-LOK |
| Size and weight | |
| Length | 2.7 in (69 mm) |
| Weight | 0.2 lb (0.09 kg)Spec table: 0.19 lb / 86 g. The description says "0.19 ounces", which is a slip. |
| Buying | |
| Material | Aluminum |
| Made in | Not published |
| Warranty Warranty How long the maker promises to repair or replace a faulty unit. Check whether it needs registration and whether it passes to a second owner. | Not published |
| Maker part number | KJ89005 |
| US price US price The price we found for the unit in the US, with where it came from and when. Prices change often, so treat it as a snapshot. | $80KJI store |
Size 2.72 x 1.5 x 0.7 in (69 x 38.1 x 17.8 mm).
Source: KJI product page (spec table).
Added October 12, 2026 · Specs last checked October 12, 2026