Airtech Studios G&G CM16 Series Rotary Hop Up TDC Converter Kit

The TDC (Top-Down-Centre) Trolley Converter is designed for the G&G CM16 (M4) Rotary Hop-up series to radically upgrade the applicable hop-up inside the stock chamber.

Types of Hop-up the TDC Integration Kit can be used for

The kit may be used in unison with all bucking types and also works perfectly for R-Hop & Flat-hop setups utilizing a trolley system that applies hop perfectly downwards for the most consistent pressure distributed onto the BB. As a result, increased accuracy over longer distances.

Why TDC (Top-Down-Center)?

The idea of using a Top-down-center is a well sought after functionality in airsoft that maximizes the amount of friction allowed onto a BB round and there are third party chambers that can achieve this.  However, switching to a third party chamber could carry a series of risks such as double BB feeding, misfeeding, and inconsistent air compression. That is the reason why we opted for an upgrade option for the original hop-up chamber that is specifically designed for the G&G CM16 replicas.

Advancement on the M-Nub

We tested the performance of many types of M-nubs for its firmness, durability, and ability maintain its shape under intense pressure. We settled with a version that ticks all of these boxes. 2x M-nubs are included that covers the length of the hop-up window to maximize the amount of exposure onto the bucking and then BB. This ensures the most stable hop, while the BB accelerates through the hop mound/ Arch.

Outer Barrel Modification

Please note that this kit will require modification to the outer barrel of your airsoft replica, however, is straightforward. Full instructions on how to modify will be included in the instruction manual to download. The results are worth your while!

Instruction Manual

The full installation manual will be provided here for download, please follow all steps to ensure a successful install.

Package Contents

1 x Front Bracket
1 x Back Bracket
2 x Trolley Unit
2x M-Nub
1 x Hop-up Arm
1 x M2 Bolt
1 x M2 Nut