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How to Install KNS Anti-Rotation Pins

The M16 is an assault rifle that has a 20-inch barrel and uses .223 caliber civilian ammunition, or 5.56 NATO rounds for ammunition. When it is full of ammunition, it weighs less than nine pounds. Pinhole wear can affect your M16's shooting accuracy and speed. The KMS anti-rotation pins help eliminate pinhole wear as well as keep the sear pin in place. Installing the anti-rotation pins requires you to take apart your M16.

Things You'll Need

Small screwdriver

Instructions

- 1
  Ensure that your M16 is empty and contains no ammunition.
- 2
  Press the magazine release lever behind the magazine and pull the magazine out.
- 3
  Place the fire selector level in the "Safe" position.
- 4
  Locate the takedown pin behind the fire selector lever. Push the takedown pin as far as you can with the small screwdriver. Pull the upper receiver from the lower receiver. Push the receiver pivot pin behind the slip ring to completely remove the upper receiver.
- 5
  Match the location of your KNS anti-rotation pin to your receiver's sear pin. Push the pin in with the screwdriver about 1/4 in. down. Turn and rotate the retaining cup under the head of the take down pin. Push the anti-rotation pin completely into the receiver. Replace your M16 parts back together.

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