The Patented Arisaka Offset Scout Mount is designed specifically for the Surefire Scout Light M600 and M300 series weapon lights, the Modlite PLH, PLHv2 and OKW weapon lights, the Arisaka 300, 600, 18650 and 18350 Series, and the Streamlight Protac Rail Mount 1, 2 and HL-X (non-laser). It replaces the stock Picatinny rail adapter with a low profile mount which tucks the light in much closer to the handguard. When used on the side mounting surfaces of Picatinny handguards, the Offset Scout Mount places the light at a 45 degree angle and tucks it in closer to the rail system. Oriented upwards, the light is located at approximately the 1:30 or 10:30 clock positions. Oriented downwards, the light is located at approximately the 4:30 or 6:30 clock positions. Compatible with the Modlite PLH, PLHv2 and OKW, Surefire M300A, M300B, M300C, M300V, M312, M322, M312V, M313V, M322V, M600B, M600C, M600P, M600U, M600V, M600DF, M612, M622, M603V, M612V, M622V, Streamlight Protac Rail Mount 1, 2 and HL-X (non-laser), CD REIN, and Arisaka 300, 600, 18650 and 18350 Series. Length: 1.30" Weight: 0.7 oz The mount is CNC machined from 7075-T651 and 6061-T651 aluminum, and MIL-A-8625 Type III hard coat anodized. Includes necessary screws to attach light body to mount. Requires a T27 Torx/IP27 TorxPlus and T20 Torx/IP20 TorxPlus driver for installation (not included). A T9 Torx driver is required to remove the stock Picatinny mount from Surefire Scout Lights. Recommended torque: 30 inch lbs for clamping screw and 20 inch lbs for light body screws with Loctite 222 or 243. Hardware: One 10-32x1.25" Torx cap head screw, two 8-32x5/16" Torx flat head screws. This product is covered by U.S. Patent No(s). D999871 and other pending patents. Made in the USA.