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47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

19.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

19.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

44.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

44.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

44.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

51.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

51.49
  • Specially Designed
  • Specialised Airflow
  • Upgrade Inner Barrel

A new unique range of barrels by Maple Leaf designed to produce consistent air flow and pressure behind every BB as it leaves the barrel.

41.99
  • 6.02mm Tightbore barrel
  • Stainless steel construction
  • For most Airsoft AEGs

If your AEG needs a bit of extra accuracy to get the job done, a tightbore inner barrel will do the trick! This Stainless Steel Tightbore Inner Barrel from ZCI has a 6.02mm bore, meaning a slight rise in FPS using the same mainspring and improvements in accuracy at long range. 

These barrels are designed to fit any Tokyo Marui spec AEG and are constructed from stainless steel for maximum rigidity and to retain straightness in the long term. Ideal for an AEG DMR build or any other AEG-based build which requires accuracy and more long range performance, the ZCI Tightbore will have your AEG shooting at its very best!

47.99
  • 370mm length
  • 6.00mm diameter +/-10%
  • Stainless steel build

This is for you techies looking to get the maximum performance from your VSR or gas blowback Airsoft rifle. This Prometheus inner barrel is 370mm in length and 6.00mm in diameter, that's right - 6.00mm! Truly the tightest of bores!

Prometheus is a well known brand that has been in the Airsoft game for a long time and the quality has always stood at a consistently high level.

Constructed from stainless steel and, the small diameter reduces as much possible air loss and allows for maximum performance and a higher FPS to be reached, although check with your site's FPS limit before bringing your newly upgraded Airsoft rifle to skirmish. Due to the minimal diameter of this barrel, make sure to use high-quality BBs such as the G&G BB range, to avoid potential jamming of BBs.

29.99
  • For GBB Pistol
  • 180mm Length
  • 6.04mm Diameter

A Maple Leaf inner barrel for Gas Blowback Airsoft Pistols.

35.99
  • 6.02mm diameter
  • 370mm length
  • Stainless steel construction

If you are looking to up the performance of your AEG and take it to the next level, Maple Leaf has got what you need. This 6.02mm Tightbore inner barrel is constructed from stainless steel and features a flawless internal finish for perfect shots every time. The 6.02mm is one of the tightest possible inner barrels that can be installed to get the most potential from your rifle and increase your FPS and accuracy to stay ahead of the competition.

The barrel measures 370mm and can be any rifle with an AEG-compatible HOP up, for those of you wanting to improve your rifle's air seal and overall efficiency. With the barrel being so tight, make sure to keep it clean for maximum performance.

35.99
  • 6.02mm diameter
  • 455mm length
  • Stainless steel construction

If you are looking to up the performance of you AEG and take it to the next level, Maple Leaf has got what you need. This 6.02mm Tightbore inner barrel is constructed from stainless steel and features a flawless internal finish for perfect shots every time. The 6.02mm is one of the tightest possible inner barrels that can be installed to get the most potential from your rifle, and increase your FPS and accuracy to stay ahead of the competition.

The barrel measures 455mm and can be any rifle with an AEG-compatible HOP up, for those of you wanting to improve your rifle's air seal and overall efficiency. With the barrel being so tight, make sure to keep it clean for maximum performance.

35.99
  • Compatible with the Novritsch SSP18
  • Better accuracy and power!
  • The length matters....

This is a longer inner barrel for the Novritsch SSP18 pistol. It adds an extra 15mm of length to the barrel. This time, for superior accuracy and power, size absolutely matters... The longer a barrel is, the more time there is for a BB to speed up and spin. This makes it more precise and faster when leaving the barrel, providing you with a more consistent shot so you can dominate your skirmishes with ease.

It is ideal for those who like to use a compensator or suppressor on their SSP18. Unfortunately, due to the extra length, it’s not compatible with most tracer units. This is a technical part and it is only encouraged to install if you are confident in your knowledge and skills.

71.99
  • SUS304 Stainless Steel construction
  • 6.01mm Bore - Extra tight!
  • For all Airsoft AEGs - Length dependant

If you're seeking a tightbore inner barrel for your DMR build, the LAMBDA ONE 6.01mm Steel Tightbore Inner Barrel for AEG is what you need. This precisely made steel tightbore inner barrel is polished to perfection on the inside and is very rigid thanks to its SUS304 stainless steel construction. 

Being of 6.01mm bore, this is one of the tightest inner barrels available, offering a slight increase in FPS when installed and excellent accuracy potential. Tolerances are equally precise, boasting a maximum of 1-micron deviation from the stated 6.01mm bore. As such, we recommend only using high-quality ammo such as G&G P.S.B.P, BLS, ASG Blaster Devil and Delta Armory Diamond BBs with this inner barrel. 

This is an AEG cut inner barrel, meaning it is compatible with any standard Airsoft AEG. Whether you're building a DMR or want improved accuracy and air efficiency from your standard FPS setup, the LAMBDA ONE 6.01mm Steel Tightbore Inner Barrel for AEG is one of the best options on the market!

Upgrade inner barrels for airsoft M4 / AR15 rifles and more

Here at Patrol Base we have a wide variety of airsoft inner barrels available both in store and online. We stock barrels for both AEG airsoft guns, gas weapons and more, with common diameters such as 6.01mm, 6.03mm and 6.05mm. 

Looking to replace the inner barrel of another gun? Our range of airsoft inner barrels offer options for almost any assault rifle, pistol and sniper, such as M4, G36, MP5 and even VSR and L96 types.

Shop our AR15 and M4 length inner barrels online today or visit us in store.