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SA TDC Magnus™ M4 Hop-Unit Unit and Helium™ Flat Bucking - Black
TDC Magnus™ M4 Hop-Up Chamber and Helium™ Flat Bucking from Specna Arms in black.
For AEG airsoft rifles M4, M16, AR15, MK18, HK416 and others.
Precise TDC pressure for maximum accuracy.
Helium™ Flat bucking without a nub.
Stable BB rotation even with heavier ammunition.
Another product variants
BlackOn stock
Accessories
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Precision Inner Barrel for AEG by Maple Leaf with a diameter of 6.02 mm. Length of 370 mm (M4, MK18 BLOCK 2, HK416D, SCAR-H, M249, MK46 and other models). Increases performance, range and accuracy. Compatible with AEG guns of TM (Tokyo Marui) standard. Barrel cutouts for both AEG and GBB / VSR hop-up chambers. AEG variant with bridge.
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12,26 € In Stock4UANTUM Friction Hop-Up Rubber for AEG4UAD001
High-quality 4UANTUM Friction hop-up bucking by 4UAD for AEG / HPA rifles. Redesigned nub for perfect range and accuracy. Capable of hop-up for heavy sniper BBs up to 0.48g. Traditional single-point nub with minimal room for BB misalignment. Accuracy, range, and precision, that’s what it’s all about!
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6,34 € In Stock4UANTUM High Viscosity Airtight Sealant SEAL - Transparent4UAD006
4UANTUM SEAL Silicone Grease for Sealing by 4UAD in a transparent finish. High-viscosity sealing grease. Ideal for sealing repairs and preventing leaks from damaged O-rings. Suitable for electric AEGs, manual, GBB, CO2, and HPA gas guns. Content: 15 ml. Easy application with a pen applicator.
6,34 €Out of stock
Specna Arms TDC Magnus™ M4 Chamber
Want to increase the accuracy of your AEG M4? Looking for a chamber that provides a stronger and more stable pressure even with heavier BBs? Trying to eliminate the issue of curving shots and get consistent backspin? The TDC Magnus™ hop-up chamber paired with the Helium™ Flat bucking is exactly what your rifle needs. TDC pressure acts vertically and directly above the barrel window, removing inaccuracies typical of standard lever-based systems. The Flat bucking, thanks to its smooth internal surface, ensures a wider contact patch, stronger backspin, longer range and excellent accuracy.
Example of assembled chamber (inner barrel not included)
Key Features
- TDC pressure:
Vertical pressure from above – no levers at odd angles, just maximum accuracy. - Helium™ Flat bucking:
Nubless design with a wide contact surface for strong and stable backspin. - Improved range and accuracy:
Ideal for heavier BBs (0.30+ g). - Nylon:
Durable, lightweight chamber resistant to rough handling. - M4 / AR15 compatibility:
Designed for most AR15 AEG platforms.
Technical Specifications
- Chamber material: Nylon
- For rifles: M4 / AR15 AEG
- Pressure type: TDC (vertical top-down pressure)
- Bucking type: AEG Flat
Package Contents:
- Complete Magnus™ M4 hop-up chamber
- Helium™ Flat hop-up bucking
| Color | Black |
| Hop-Up chamber material | Plastic |