Ring Light Mount - CMR - The Arisaka Ring Light Mount is available for KeyMod, M-Lok and CMR interfaces. The Ring Light Mount for the Centurion Arms Modular Rail (CMR) is illustrated below. The mount consists of a machined body with vertically-mounted, removable ring. There are two choices in ring size; the small fits light bodies with a diameter from 0.84" to 0.88" while the large fits light bodies from 1.00" to 1.03" in diameter. The mount comes with one ring, and you pick the one applicable to your needs. Unfortunately, not knowing whether the ring was solid or split on Arisaka's website, I wasn't able to use the small ring with my intended light as I had thought that I could expand a split ring to clear the larger diameter base cap. So, I'm only able to illustrate the large ring here. The CMR utilizes a direct-attach method with two #8-32 screws. The ring is secured to the body with a single screw, which threads into the ring's stud.

Description - The Arisaka Defense Offset Scout Mount KeyMod is designed for the M300 and M600 series Scout weapon lights from SureFire. It replaces the stock Picatinny rail adapters, and attaches directly to the mounting interface on the body. It's an angled plate that will fit most KeyMod handguards like the BCM KMR (pictured here) and Noveske NSR. It measures 1.265" long and is only 0.165" thick. It uses BCM's patent pending inverted screws to attach to the KeyMod handguard (same type as used on BCM's KeyMod sling mount), which actually move outwards as they're tightened, instead of in. A recoil lug keeps it from moving fore-aft. A torx wrench is provided.

The mount also features four lateral mounting positions for the light body, which attaches with two screws (no hex wrench is provided for the screws). I really like this feature as it enables the user to move the light body closer or farther away from the rail, and clear rail-mounted front sights if necessary. The difference in lateral positon is approximately 0.320".

The Offset Scout Mount KeyMod is CNC machined from 6061 aluminum and Type III hard coat anodized. It's currently available in black, and weighs 0.4 oz.

Description - When the SureFire M600 Scout light came out, I was impressed at how compact it was compared to the old 6P lights (why couldn't they just make them all as slim I wondered). Then the mini-Scount (M300) came out and that became one of my favourite lights. I had issues with the factory Picatinny mount thumbscrew loosening up even with locktite, so I'd always swap out the factory rail-grabber mount to an aftermarket mount. With aftermarket mounts, the Scouts could be tucked in as close as possible to the handguard in the 10:30 or 1:30 positions. The main issue in that location was that a rail-mounted backup front sight interfered with the Scout body. Specifically, the protrusions, or flanges, that made up the base of the factory Picatinny mount. They flare out from the body and more often than not, prevent the Scout from being mounted right beside the front sight.

300 Series - The Arisaka Defense 300 Series Light Body is a replacement body for the mini-Scout (single battery); and does away with the protrusions, enabling the user to mount the light right next to most rail-mounted front sights. The 300 Series Light body is compatible with all SureFire E1 series and Scout Light M300 series tailcaps and heads like the KM1A, KE1A, and KX1A. It is also compatible with all aftermarket Scout mounts, as it has the same mounting holes and square lug interface on the underside of the body.

The 300 Series Light Body is CNC machined from 6061 aluminum and Type III hard coat anodized. High quality Buna-N O-rings are included. The ends are bare aluminum because the body is used to conduct electricity, so they need to be uncoated. Note that if the body is refinished, the ends need to be masked off, or the coating removed later one. It's currently available in black, and weighs 0.5 oz.

600 Series - The Arisaka Defense 600 Series Light Body is a replacement body for the M600 Scout Lights powered by two CR123 batteries. Light the 300 Series body, it does away with the protrusions, enabling the user to mount the light right next to most rail-mounted front sights. The 600 Series Light body is compatible with all SureFire E2 series and Scout Light M600 series tailcaps and heads like the KM2A, KE2A, and KX2C. It is also compatible with all aftermarket Scout mounts, as it has the same mounting holes and square lug interface on the underside of the body.

The 600 Series Light Body is CNC machined from 6061 aluminum and Type III hard coat anodized. High quality Buna-N O-rings are included. It's currently available in black, and weighs 0.6 oz. Shown below is the Arisaka body assembled with Malkoff M600 head and mounted using the Arisaka Offset Scout Mount Keymod. The difference in clearance is shown with the SureFire and Arisaka bodies; the stock body requires that it's offset as far away from the front sight as possible so that the mounting lugs don't interfere with the front sight clamp. The Arisaka body can be mounted two positions closer to the sight; tucking it in as close as possible to the handguard. Quality of machining and finishing on both bodies are excellent. Up until now, those who wanted Scout light were limited to purchasing the SF Scout, as no one offered Scout bodies to build their own lights. Now, Arisaka has opened up more affordable options for the consumer. Please make 'em in tan, Arisaka.

2/5/17 - Updated Light Bodies - Arisaka has made an inline manufacturing change with their 300 and 600-series light bodies. Previously, the Arisaka light bodies were not 100% compatible with SureFire V-series IR heads due to the anodizing process and conductive contact surfaces. If you look at my writeup of the original Arisaka light bodies above, you'll see that the only exposed parts are at the end of the threads. On the SureFire Scout body, the threads and inside of the body are uncoloured. The updated Arisaka bodies have a MIL-DTIL-5541 Type II Class 3 chemical film on the threads and inside of the light bodies to prevent oxidation but still allow conductivity. The same Type III hard coat is used on the outside. The threads now appear 'raw' like the SureFire Scout bodies. This will resolve any compatibility issues with SureFire IR heads.

Also shown is the updated KeyMod Inline Scout Mount, which is now made in 7075 instead of 6061 aluminum. It now uses the BCM KeyMod screws instead of the KeyMod nuts used on the original version. It weighs 0.5 oz vs. the 0.6 oz of the original. Included are the necessary screws to attach the light body to the mount. The T15 Torx and 5/64" allen wrenches are not included. Does not work with SureFire AA Scout bodies. The light body is first installed to the mount; then the mount attached to the handguard. The tailcap is left off during installation to allow access to the two KeyMod screws.

When I first started featuring Arisaka Defense products on my website, the illumination lineup was limited to just light mounts. Arisaka then introduced their 300 and 600-series light bodies, which are direct replacements for SureFire's Scout light bodies, and now, they've introduced their Tailcap. This enables the consumer to pick up a SureFire or aftermarket light head and build their own Scout light. Arisaka is also offering complete 300 and 600-series lights, utilizing Malkoff Devices heads.

Tailcap - The Arisaka Tailcap is a replacement switch for the Arisaka 300 and 600 Series Light Bodies, as well as the Surefire Scout and E-Series lights. It has a recessed/protected switch that cannot be accidentally activated as it's encircled by a protective ring. The ring has no scallops or holes, unlike the SureFire Scout tailcap. A serrated band adds grip during installation and removal.

The Tailcap features both momentary and constant-on functionality: the user can press the switch for momentary activation, and continue pressing forward until it clicks for constant-on. Clicking again will turn the light off. The Tailcap is built around Don Mcleish's highly regarded McClicky switch, which many people use to repair older Surefire tailcaps. I did notice that the switch on the factory SureFire tailcap is stiffer, and that the Arisaka switch is depressed more easily. It maybe takes half the force to depress. Personally, I'd like it to be firmed up a bit to prevent accidental engagement of the constant-on mode (especially with gloves).

Like Arisaka's other illumination products, the Tailcap is CNC machined from 6061 aluminum and MIL-A-8625 Type III hard coat anodized. It has a maximum diameter of 0.95" and is 0.97" long. It weighs 0.4 oz.

CMR Offset Scout Mount - The CMR Offset Scout Mount is designed for the Centurion Arms CMR handguard. The CMR uses a proprietary method of mounting accessories, which is a series of threaded holes that allow accessories to be direct-mounted; saving weight and keeping it simple. The mount is compatible with the SureFire M300 and M600 Scout lights (it replaces the stock Picatinny rail adapters, and attaches directly to the mounting interface on the body), as well as Arisaka's own 300 and 600-series bodies. The CMR mount is of the same basic design as the Arisaka Scout Mount KeyMod. It's a 45-degree angled plate that measures 1.265" long and is only 0.165" thick. Instead of KeyMod screws, it uses two 8-32 screws (included) to attach it to the CMR.

The mount also features four lateral mounting positions for the light body, which attaches with the two included screws (no hex wrench is provided for the screws).This enables the user to move the light body closer or farther away from the rail, and clear rail-mounted front sights if necessary. The difference in lateral positon is approximately 0.320". When uses with Arisaka's light bodies, even more clearance can be gained for larger front sights.

The Offset Scout Mount CMR is CNC machined from 6061 aluminum and Type III hard coat anodized. It's currently available in black, and weighs 0.4 oz.

I've illustrated the CMR mount below with Arisaka's 300-series light body and Malkoff head, along with the SureFire tapeswitch tailcap. Typically, I don't use tape switches, preferring to operate the light with my thumb. However, on the CMR, due to the front QD sling swivel socket at the front end of the handguard, I cannot mount the Scout light forward enough to do it comfortably. That's my one gripe about the CMR - I'd rather have the same accessory mounting interface extend all the way to the front of the rail than have a QD socket there. So, I mounted the light on the opposite side of my support hand (I'm a lefty) and activate it with a top-mounted tape switch instead.

Inline Ring Mount - The Inline Ring Mount is designed to attach a 1" diameter light body to a handguard. It's available in KeyMod and M-Lok versions (KeyMod shown here). The base is a derivative of their Inline Scout Mount previously featured, but has the 1" ring interface instead of the Scout interface. The mount is particularly useful for 45-degree mounting flats on handguards, such as the BCM KMR here. It can also be used on the side flats, of course.

The base itself is very low profile (only 0.2" thick), and features three mounting positions for the ring that allows it to be moved closer or farther away from the rail to place it as close as possible to the top rail or to clear a backup front sight. The side positions are offset 0.12" from the center one. The user selects one of three possible positions; center, left or right; and attaches the ring to the mount. The light body is then secured with the clamp. The ring is reversible so the clamp screw should always face to the outside. The outer diameter of the light body only sits 0.41" above the mounting surface, making the entire unit very low profile. The base length is 2.37" long, the ring inner diameter is 1.00" and the assembly weighs 1.0 oz.

Like Arisaka's other illumination products, the Inline Ring Mount is CNC machined from 6061 aluminum and MIL-A-8625 Type III hard coat anodized. Note that the new base pictured here has Arisaka's logo machined into it - seven circles around a larger center circle. It was something I suggested they do (add some kind of a manufacturer mark), and they went with it. I think it's a nice touch.

Offset Picatinny Mount - The Offset Picatinny Mount is a combination of Arisaka's Offset Scout Mount, and Picatinny adapter. The mount attaches to the sides of a handguard, placing the Picatinny adapter at a 45-degree angle. It's intended for use with Picatinny-based lights like the Surefire X300 or Inforce WML. The mount is a 45-degree angled plate that measures 1.265" long and is only 0.165" thick. It's available for the M-Lok and KeyMod (shown here) interfaces. It uses BCM's patent pending inverted screws to attach to the KeyMod handguard (same type as used on BCM's KeyMod sling mount), which actually move outwards as they're tightened, instead of in. A recoil lug keeps it from moving fore-aft. A torx wrench is provided.

The 5-lug Picatinny rail section has two sets of holes. One set are threaded holes, which are used with the angled mount. The other set are Arisaka's tri-position holes (not threaded), for use with their inline base. The mount features four lateral mounting positions for the rail section, which attaches with two screws (no hex wrench is provided for the screws). The difference in lateral positon is approximately 0.320". Since the angled mount has four mounting positions, and the Picatinny rail has two, there's are a total of eight lateral mounting positions with this mount, spanning approximately 0.5". This allows the user to move the Picatinny rail section closer or further away, to accommodate the clamp of the light, and rail mounted front sights. You have to mock it up a few times to get the closest possible mounting location to the rail. The rail is also reversible from front to back.

The Offset Picatinny Mount is CNC machined from 6061 aluminum and Type III hard coat anodized. It's currently available in black, and weighs 1.0 oz.

Offset Scout Mount M-Lok - The Offset Scout Mount M-Lok is the M-Lok compatible version of the Offset Scout Mount previously featured. Other than the M-Lok interface, everything else is identical. M-Lok is Magpul's modular locking accessory mounitng system that is a direct-attachment method for mounting accessories to compatible handguards. Rather than the keyhole-shaped holes of Vltor's KeyMod system, the M-Lok uses horizontal slots in the handguard, thought which a proprietary cammed T-nut is inserted from the front and tightened to secure the accessory to the handguard.

I've illustrated the Offset Scout Mount M-Lok with a 600-series Scout Light, mounted to the Kinetic Development Group MREX for the FN SCAR. The light is tucked up close to the front sight, and is a lower profile option than the INFORCE WML I had on there before (when I had the rail on the side).

Arisaka has also introduced their momentary-only tailcap. The Arisaka Momentary Tailcap is a replacement switch for the Arisaka 300 and 600 Series Light Bodies, as well as the Surefire Scout and E-Series lights. It has a recessed/protected switch that cannot be accidentally activated as it's encircled by a protective ring.

The previously released Clicky Tailcap features both momentary and constant-on functionality: the user can press the switch for momentary activation, and continue pressing forward until it clicks for constant-on. The Pressing the Momentary tailcap turns the light on, and off when the switch is released. Twisting it on all the way will turn the light on constantly, until it's twisted off. When installing the Momentary Tailcap, thread it onto the light body until it bottoms out (constant on), then back it off (unthread it) approximately 0.5 to 1.5 turns for momentary function or to prevent accidental activation during storage or travel. Shown below are the Momentary and Clicky tailcaps; the main visible difference between the two are the internals and springs.

Like Arisaka's other illumination products, the Tailcap is CNC machined from 6061 aluminum and MIL-A-8625 Type III hard coat anodized. It has a maximum diameter of 0.95" and is 0.97" long. It weighs 0.4 oz.

Side Scout Mount, Picatinny - The SSM Picatinny is 1.265" in length, 0.2" thick, and weighs only 0.6 oz. It's small. It replaces the stock Picatinny rail clamps on the Scout light (SureFire M600DF shown below) and takes up only one slot on a Picatinny rail. It includes the screws to attach the light body to the mount, and requires a 1/8" hex wrench and IP20/T20 Torx driver for installation (not included). Illustrated below is the M600DF mounted to a KAC URX handguard. The SSM-P mount brings the light in a bit closer to the barrel than the OEM mount, and raises it up so that it's easier for thumb activation.

Shown below is the SSM Picatinny mounted to the removable Picatinny rail on a Vltor VIS-KM handguard. The Vltor VIS-KM has KeyMod slots and removable rail sections. I'm left-handed, so I mounted the M600DF on the left side of the handguard, where the throw lever of the DBAL A2 is (I swapped out the original ARMS mount with a Larue). You can see that the light is tucked in just about as close as it will go.

Side Scout Mount, KeyMod - The SSM KeyMod is 1.265" in length, 0.2" thick, and weighs only 0.6 oz. It utilizes two BCM KeyMod inverted screws to secure it to any KeyMod handguard. It replaces the stock Picatinny rail clamps on the Scout light (SureFire M600DF shown below) and takes up two KeyMod holes on a handguard. It includes the screws to attach the light body to the mount, and requires a T15 Torx and IP20/T20 Torx driver for installation (not included). Illustrated below is the SSM in FDE Cerakote with M600DF mounted to the Vltor VIS-KM handguard (same one as above, but with the Picatinny rail removed). The SSM KeyMod mount places the light ever so slightly closer to the handguard than the SSM Picatinny on this particular handguard.

1 Inch Light Mount - KeyMod Version Mod 0 - The 1 Inch Light Mount - Keymod Version is a simple dual-ring design, for 1-inch diameter light bodies. It weighs 1 oz and is designed to be mounted at the 10:30 or 1:30 positions.

The 1 Inch mount is a one-piece design with dual ring clamps that will fit most common 1-inch diameter light bodies. It has two left-hand thread mounting screws and a single recoil lug between them. The light is held in the rings by clamp tension, and the dual rings ensure solid support for the light. It's reversible from left to right for ambidextrous use. Since the mounting screws are accessed through the top of the mount; this requires that the mount be attached to the handguard before the light is installed. I tried the mount and light in a few different positions before settling on the final one. The mount is illustrated below with a Surefire P60 light. The supplied Torx wrench is used for both the mounting screws and light clamp screws. The mounting screws are meant to be torqued to 30 in-lbs and the clamp screws 25 in-lbs. Blue thread lock can be used on the mounting screws if desired.