Forward-assist assemblyForward-assist springForward-assist retainer pin
3⁄32-inch roll-pin punchBrass or plastic hammer
Brownells offers several forward-assist assemblies that come ready to install. All you have to do is place the return spring over the pawl and inside the plunger cap, and you are ready to add it to the upper. Get the roll pin that holds the forward assist in place started into the receiver. Orient the forward assist and insert it into the receiver. Press the plunger against the spring while tapping the pin into place. Use a 3⁄32-inch roll-pin punch to drive the pin past flush.
Function Check: Push the plunger to make sure the pawl moves forward and returns under spring pressure.