The Chainknife Bayonet is a science fiction airsoft rifle and paintball marker attachment. Its futuristic characteric is inspired by Warhammer 40,000's chainsword. It attaches via Picatinny rail or Weaver rail to any rifles with a rail interface system (RIS). This Chainknife Bayonet is an excellent melee weapon in a zombie apocalypse airsoft scenario. It is also an excellent prop for cosplay and Halloween festivity. The Chainknife Bayonet comes in white plastic, ready for you to paint to your vision. You will need two #6-32x1-1/4" screws and two #6-32 nuts to fasten this fake underbarrel saw-knife to the rifle's Picatinny rail. The screws and nuts are not include, but can be easily sourced from your local hardware store (e.g. Home Depot, Lowes, etc.). Airsoft gun model used for illustration of this Chainknife Bayonet provides size comparison. The airsoft gun is not included. WARNING: This product may be mistaken for a weapon by law enforcement officers or other people. Altering the coloration or markings required by state or federal law or regulations so as to make this product look more like a weapon is dangerous, and may be a crime. Brandishing or displaying this product in public may cause confusion and may also be a crime. WARNING: Although you can mount this make-believe prop to your real firearm, we have never tested it with real firearms. We do not know if the firearm recoil will or will not damage this cosplay prop. Use this prop with real firearms at your own risk.