T-N.T. HOP-UP Bucking Guide
Choosing the Right Hardness & Model
【How to Choose the Right HOP Bucking?】
Different HOP bucking designs directly affect BB spin behavior, BB weight compatibility, HOP pressure characteristics, trajectory performance, and shooting stability.
T-N.T. offers multiple HOP bucking designs optimized for different platforms, power levels, and shooting requirements. Below is an overview of each series and its recommended setup direction.
【T-HOP Bucking】
T-HOP is the standard all-purpose bucking design from T-N.T., suitable for pistols, SMGs, and rifle platforms. Most T-N.T. Retrofit Kits include T-HOP buckings as standard configuration.
Key features include:
• High versatility
• Suitable for low to medium power setups
• Compatible with various platforms
• Works with most standard HOP nubs and narrow pressure arms
• Recommended BB weight: 0.25g–0.4g+
Recommended for players seeking stable all-around performance and multi-platform compatibility.
【TR-HOP Bucking】
TR-HOP is a sniper-oriented bucking design featuring a larger HOP contact area. Most T-N.T. sniper upgrade kits use TR-HOP buckings as the standard configuration.
Key features include:
• Larger HOP contact area
• Suitable for medium to high power setups
• Recommended for wide HOP nubs or pressure arms
• Recommended BB weight: 0.36g+
• Optimized for long-range setups
Recommended for players focused on long-range consistency and high spin control.
【H.L.R. Bucking】
H.L.R. is a large-contact-area HOP design developed by combining and further refining characteristics from both T-HOP and TR-HOP designs.
It can be used on pistol, rifle, SMG, and sniper platforms, and is especially suitable for setups requiring higher HOP efficiency.
Key features include:
• Large HOP contact area design
• Improved BB contact consistency
• Designed for higher rotational efficiency
• Recommended for wide HOP nubs or pressure arms
• Recommended BB weight: 0.4g+
※ Some platforms may not support H.L.R. buckings due to HOP chamber pressure arm limitations.
Recommended for players seeking long-range consistency, stable spin performance, and higher HOP efficiency.
【TL-HOP Bucking】
TL-HOP is designed for lightweight BBs and low-power setups, based on a modified H.L.R.-inspired structure.
The design uses a curved pressure profile from front-to-back and side-to-side, helping reduce sudden BB pressure changes and improving consistency on low-power platforms.
Key features include:
• Designed for low-power platforms
• Optimized for lightweight BB setups
• Reduced BB pressure variation
• Improved close-range consistency
• Recommended BB weight: 0.12g–0.32g
Recommended for CQB environments, lightweight BB setups, and low-power configurations.
【FLAT-HOP Bucking】
FLAT-HOP is designed primarily for AEG platforms and features an internal flat-contact structure without a fixed pressure patch.
This allows users to combine the bucking with different HOP nub designs depending on their preferred setup.
Key features include:
• No fixed internal pressure patch
• Compatible with various HOP nub designs
• Suitable for custom HOP tuning
• Adjustable contact area and pressure characteristics
※ Please confirm that the HOP window size matches the nub size before installation.
Recommended for players who prefer custom HOP tuning and adjustable configurations.
【How to Choose Bucking Hardness?】
Different bucking hardness levels affect HOP pressure characteristics, temperature adaptability, and overall shooting consistency.
【Rubber Material】
● 50°
Recommended for colder environments or lower FPS setups.
● 60°
Recommended for most general environments and standard setups.
【Silicone Material】
● 60°
Suitable for most general setups and environments.
● 70°
Recommended for higher FPS and higher HOP pressure setups.
※ These are general recommendations. Actual setup preference may vary depending on platform and user preference.
【How to Choose Bucking Material?】
【Rubber Material】
• Balanced range and stability performance
• Better wear resistance
• Longer service life
• More sensitive to low-temperature environments
【Silicone Material】
• Higher friction characteristics
• Better potential range performance
• Improved low-temperature consistency
• Less affected by cold-weather performance loss
• Trajectory consistency is typically slightly lower than rubber materials
※ All recommendations above are intended as general setup references. Actual performance may vary depending on platform, power level, BB weight, and personal tuning preferences.