SureFire X300U-B/ X300V-B/ X400U/V Light Mount Parts Kit Black. SureFire has carefully crafted these Flashlight Accessories with the strength of steel and a Mil-spec hard anodized finish and the whole kit fits easily into your pocket ensuring you always have your favorite light whenever you need it. This SureFire Light Mount Parts Kit is compatible with several SureFire USB-style light mounts and includes everything you need to upgrade your rig with a SureFire powered X300UST X300VUST or X400UST light. Upgrade your weapon-mounted light with one of these SureFire Light Mounts and keep your hunting buddies at the range longer. Specifications for SureFire X300U-B/ X300V-B/ X400U/V Weapon Light Mount Parts Kit: Manufacturer: SureFire Flashlight Application: Hunting Fabric/Material: Aluminum Finish: Mil-Spec Hard Anodized Flashlight Model: X400U X300U-B X400V X300V-B Condition: New Package Contents: SureFire X300U-B/ X300V-B/ X400U/V Light Mount Parts Kit 1 Retaining Ring E-Style 9/64 1 Universal Latch 1 Picatinny Latch 1 Rail Adjustment Rod 1 T-Slot Rail 1 Washer Split Lock High Collar 1 Flat Shim SureFire Z90: X300U-B/ X300V-B/ X400U/V Light Mount Parts Kit Black