A replacement plastic nubbin for AGD Twist Lock Barrels. Replacing your nubbin will prevent double feeding and stop paintballs from rolling straight out of your barrel before you get a chance to fire your marker.

Nubbins are easy to install - just slide remove your old, worn out nubbin and slide a new on into the machined track in your Twist Lock Barrel. We recommend using a fresh barrel O-ring to keep the nubbin in place.

Nubbins typically last a long time; it's not uncommon for them to last entire seasons, even with regular use.