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 Scorpion Evo Original Chamber.
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 can be downloaded here, please follow all steps to ensure a successful install.
Hop-Up unit not included.
Package Contents
1 x TDC Flat Foot Hop-up Trolley & Spring
1 x TDC Arched Foot Hop-up Trolley & Spring
1 x TDC Spring
2x M-Nub
1 x Back Bracket
1 x Hop Dialling Wheel
1 x M2 Bolt
1 x M2 Nut
1 x M3 Bolt
1 x M3 Nut

February 2025

Airtech Studios TDC Hop-Up Converter Kit - ASG Scorpion EVO