Free Shipping On Orders $200 or more! $9.99 Flat Rate Shipping For Orders Under $200! (lower 48 states)

Lambda One Airsoft AEG 6.01mm Tightbore Barrel

Our Price

$54.99 - $84.99

Free Shipping on Orders $200 or More ($9.99 for orders under $200)

Fox Airsoft offers a 30 day warranty and return policy.

About the Lambda One Airsoft AEG 6.01mm Tightbore Barrel

The Lambda One Airsoft AEG Tightbore Barrel 6.01mm is a precision machined AEG barrel made in Osaka, Japan. It has an inner diameter tolerance of 1 micron or 0.001mm.


What's Included In The Box:

  • Lambda One Airsoft AEG 6.01mm Tightbore Barrel

Quick Overview

  • 6.01mm Diameter with Tolerances within 1 micron

  • Specialized Cut to allow for use in a TM style M14

  • SUS304 Stainless Steel

Weight & Dimensions:

  • Dry Weight of the barrel is: 6 oz

  • Entire package weight: 6 oz

  • Length Depending on above selection


Q: Why is the Lambda One AEG tightbore barrel more expensive than other tightbore barrels?

A: The Lambda One Airsoft AEG Tightbore Barrel is a precision machined tight bore barrel made in Japan. The barrel tends to be more expensive due to the extremely tight tolerances they are machined to. The barrel has a tolerance of 1 micron which is equivalent to 0.001 millimeters.


Q: Why use a 6.01mm inner barrel as opposed to a 6.03mm inner barrel?

A: The 6.01mm inner barrel will give you better accuracy than a 6.03mm inner barrel. They can cause a slight drop of fps in certain guns though as opposed to a 6.03mm tightbore barrel. It should still give better fps than a standard AEG barrel (6.05mm-6.08mm) though.


Q: What guns will the Lambda One Airsoft AEG Tightbore Barrel fit in? 

A: The Lambda One Airsoft AEG Tightbore Barrel 6.01 will fit in any AEG (Automatic Electric Gun) that will take a TM AEG barrel cut. This inner barrel also has the W groove cut for a TM M14 chamber.


Q: What length barrel do I need for my gun?



Barrel Length



M16A1 & A2 / AUG


AK47 + S / SLR105


M4A1 / SR16 / SIG 551


M1A1 / M733


G36C / SIG 552 / P90 / CAR15




Q: Why upgrade to a tightbore barrel? 

A: The main reason to upgrade to a tightbore barrel is to get improved accuracy and fps. These upgraded tightbore barrels have better fit and finish than a factory barrel. The tightbore barrels also have a smaller inner diameter (6.01mm-6.03mm) than a standard stock barrel (6.05mm-6.08mm). This helps create a better air seal around the bb and can increase fps. As for accuracy aftermarket tightbore barrels generally are precision machined and quality tested so that the bb can easily and freely pass through the barrel. Any imperfections can lead to large groupings as it can affect the backspin of the bb that is applied by the hop up. 


Q: How do I install a tightbore barrel.

A: The installation of a tightbore barrel can be very different depending on your gun. Generally to install a tightbore barrel you have to remove your hop up assembly which houses your inner barrel. After that you just need to turn the hop up all the way off and remove the barrel clip. This should allow you to remove the barrel and bucking. Then you just swap the barrel and replace the bucking and reverse the previous steps. If you are not confident in installing a tightbore barrel yourself we have a service located here on our website. ( If you choose this option select light for the level of service and ship the gun and barrel in to us.




— Customers Testimonial —

Honestly, this is the only airsoft shop I will ever buy from. Their guns are always quality. Their custom work is mind blowing. Their staff is not only helpful, but always happy to help. If you are just starting out or have been playing for years, these guys have guns, gear, and good advice for every situation.
— R. King
Awesome company and products. Received sooner than projected from Colorado and I'm in California. Less than 2 days from placing order to receiving it. . Everything shipped as ordered . Incredible selection and great price... Did my homework and eventually came back to them. I'm glad I did. My squad will be ordering and I be ordering more gear as well.
— John
Great people great place I've ordered a few small things. Delivery was on time both times great items. Yesterday I checked my mail they sent me a fox airsoft patch just to say thanks and to me that's a way to do bussiness. Fox y'all have got business keep up the good work.
— Matt
Free Shipping On Orders $200 or more! $9.99 Flat Rate Shipping For Orders Under $200!* (Contiguous 48 States)
30 / 30 Warranty & Return Policy
Expert Service
Quality Airsoft Solutions
I would love to receive updates from Fox Airsoft on special offers, game play and other players tips! *