Samson Evolution Keymod Rail Kit 4'' 1 Rail 6061-T6 Anodized Alum Blk. This one-piece 4" (1 Rail) Picatinny carbine rail comes with bolts for easy installation. The Samson Evolution KeyMod Rail easily fits around your pre-existing KeyMod rail slots making it a great addition to any rifle. The KeyMod rail system is patented by Samson and is part of the Samson Modular KeyMod family. KeyMod is patented by Samson and is applicable to handguns rifles and other weapon platforms with KeyMod interface sockets in the mounting areas of the lower receiver and handguard. It uses a single bolt to secure the rail to the handguard. The Samson KM-4-KIT Evolution KeyMod Rail Kit has the same overall dimension as a properly-sized Samson Picatinny rail providing superior strength in the places where it is most needed. This Samson Picatinny Rail provides a permanent attachment point for any Picatinny or Picatinny rail. This rail kit includes a total of five rail sections. Select the length of the Samson KM-4-KIT KeyMod Rail Kit - 4" (1 Rail) 6061-T6 Anodized Aluminum - Black that will fit most handguns. Specifications for Samson KM-4-KIT Evolution Keymod Rail Kit 4" (1 Rail) 6061-T6 Anodized Alum Blk: Mfg Item Num: KM-4-KIT Supplier SKU: 92457 Category: FIREARM PARTS Type: Rail Model: 4" (1 Rail) Finish: Hardcoat Anodized Size: 4" Material: 6061-T6 Aluminum Features of Samson KM-4-KIT Evolution Keymod Rail Kit 4" (1 Rail) 6061-T6 Anodized Alum Blk: Material: 6061-T6 Aluminum Finish: MIL-A-8625 type III class 2 anodizing The Samson KM-4-KIT Evolution Keymod Rail Kit 4" (1 Rail) 6061-T6 Anodized Alum Blk is a quality addition to the Samson lineup. For more great deals on Picatinny Rails by Samson please browse our Samson Weapon Accessories page. Samson 04-02011-01: Evolution Keymod Rail Kit 4'' 1 Rail 6061-T6 Anodized Alum Blk