Rock Bottom Airsoft got a guide for you in how to change the Hop Chamber, bucking and nub in your AEG... "In this video we will take a look at how to change components on your inner barrel group. Strictly speaking we are changing the Hop components but this guide will help you even if you only wish to change the inner barrel.

We take a look at hop unit removal. Also known as a Hop Chamber, we disassemble a rotary style Hop Chamber and have a look at installing a new one.

We will look at Hop up buckings also known as hop rubbers. In this video we change the Hop rubber out.

We look at the nub and replacement."