T-N.T. Precision Inner Barrel Guide
Types, Specs & Performance Introduction!
(⬆ Left: T-N.T. STD / S+ Inner Barrel Right: H+ / HS+ Inner Barrel)
【T-N.T. Dual Bore Air-Cushion Inner Barrel Series】
The T-N.T. Dual Bore Air-Cushion Inner Barrel series is designed as a universal platform system. By selecting the appropriate T-N.T. HOP rubber for each platform, the barrel can be installed on AEG, GBB, and VSR platforms.
T-N.T. currently offers multiple barrel length options, and selected sizes are also available through custom cutting services to better suit different platform setups and shooting requirements.
【Barrel Groove Compatibility Guide】
● Groove 1
Compatible with GBB pistols and MARUI VSR platforms.
● Groove 1 & 2
Compatible with most GBB rifle platforms.
● Groove 3
Compatible with AEG platforms and most T-N.T. Retrofit Kits.
【Standard Model｜Dual Bore Air-Cushion Inner Barrel】
(Outer Diameter 8.5mm｜Inner Diameter 6.03–6.35mm)
The Standard Air-Cushion Inner Barrel is one of T-N.T.’s signature patented barrel designs and is widely known among players as the “Air-Cushion Barrel.”
This design features dual inner bore sections within a single barrel body, including a larger bore area near the muzzle. This structure allows airflow to surround the BB more evenly, creating what we refer to as the “Air-Cushion Effect.”
During development, we found that when the airflow release after the BB exits the barrel becomes more stable, it can effectively reduce disturbance immediately after muzzle exit, further improving overall trajectory stability and shooting consistency.
Key features include:
• Dual bore air-cushion structure
• Improved airflow release stability
• Better BB exit consistency
• Improves BB stability after exiting the barrel
• Enhanced long-range trajectory performance
Because the barrel is manufactured using a one-piece machining process, it also helps improve overall barrel coaxiality and reduce structural alignment errors.
【S+ Eclipse Dual Bore Air-Cushion Inner Barrel】
(Outer Diameter 8.5mm｜Inner Diameter 6.03–6.35mm)
The S+ series is based on the standard Air-Cushion Inner Barrel design, with the addition of the T-N.T. Eclipse Design at the barrel entrance.
This design helps guide the BB toward the center axis before entering the barrel while maintaining better alignment with the nozzle.
Our goal with this design is to reduce lower-surface friction and feeding deviation, allowing the BB to enter the HOP pressure area in a more stable condition.
Key features include:
• Improved BB centering effect
• Better nozzle-to-BB alignment
• Reduced BB-to-barrel contact area
• Lower HOP pressure requirement
• Better compatibility with heavy BB setups
• Reduced BB bouncing after passing the HOP contact point
• Improved trajectory consistency and stability
【H+ Heavy Dual Bore Air-Cushion Inner Barrel】
(Outer Diameter 9.95mm｜Inner Diameter 6.03–6.35mm)
The H+ series is based on the standard Air-Cushion Inner Barrel design but features a thicker outer diameter to further improve vibration resistance and suppress barrel resonance.
By increasing overall barrel rigidity, the design helps reduce the influence of barrel vibration during firing, improving long-range shooting stability.
The H+ series was originally developed for bolt-action sniper platforms, but can also be installed on AEG and GBB platforms if outer barrel clearance allows.
Key features include:
• Heavy outer barrel structure
• Improved vibration resistance
• Reduced barrel resonance effects
• Better long-range stability
• Improved shooting consistency
For long-range and high-precision setups, the heavier barrel structure can provide noticeably more stable performance.
【HS+ Eclipse Heavy Dual Bore Air-Cushion Inner Barrel】
(Outer Diameter 9.95mm｜Inner Diameter 6.03–6.35mm)
The HS+ series is the advanced version of the T-N.T. H+ Heavy Air-Cushion Inner Barrel, combining the S+ Eclipse Design with the heavy outer barrel structure of the H+ series.
In addition to improved BB centering and reduced lower-surface friction, the HS+ series also benefits from enhanced vibration resistance and barrel stability.
Key features include:
• BB centering effect
• Improved nozzle alignment
• Enhanced vibration resistance
• Better heavy BB stability
• Improved long-range trajectory consistency
• High-precision shooting stability
The HS+ series is designed for players seeking maximum stability, long-range precision, and optimized heavy BB performance.