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Angel Custom G2 SUS304 Stainless Steel Precision 6.01mm Airsoft GBB Pistol Tightbore Inner Barrel (Length: 137mm KJW KP06)

ID: 88222 (AC-G2-GBB-KP06)
Angel Custom G2 SUS304 Stainless Steel Precision 6.01mm Airsoft GBB Pistol Tightbore Inner Barrel (Length: 137mm KJW KP06)
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Angel Custom



  • Improve grouping / accuracy
  • Increase power by 20~50 FPS (varies pending barrel length) and range / distance (maximum range / effective range varies pending barrel length)
  • Highest strength & durability among all existing Airsoft barrels
  • Milled channels to secure barrel onto the hopup unit
  • CNC milled and tapered crown
  • Individually crowned edges for improved performance
  • Crafted from high quality 100% SUS304 stainless steel
  • Rubber high-grouping bucking included
Angel Custom G2 6.01mm Inner Barrel Series are the pinnacle of quality and performance in the Airsoft Industry. Utilizing advanced machining technology with premium grade materials, these inner barrels stand out in both quality and performance.
After considerable testing and R&D, SUS304 stainless steel was chosen for its qualities that it gives to the application of barrel manufacturing. Despite its higher cost and manufacturing complexity, SUS304 stainless steel provides a degree of hardness, durability, and resilience to ensure the barrel retains its consistency and accuracy even after tens of thousands of rounds. Other qualities of SUS304 stainless steel is that it has natural scuff, corrosion, and weather resistant qualities making it easier to maintain for years of reliability. Each barrel is crafted using precision machinery; a high polish and precision crowning provide peak performance.

Compatibility / To Determining the inner barrel length you need:
To determine the length you need, measure from where the magazine feed the bb to the tip of your inner barrel, or where you want your inner barrel to end. Subtract ~5mm for hopup unit. Remember, it is perfectly okay to have an inner barrel shorter than your outer barrel, or have the exposed sections hidden in a longer flashhider or mock silencer.

Manufacturer: Angel Custom


Material: High Quality 100% Pure SUS304 Stainless Steel
Overall Length: 137mm
Inner Diameter: 6.01mm

Why Angel Custom?
  • SUS304 stainless steel barrels are simply better than alloy, aluminum, and brass barrels
  • Angel Custom Tight bore barrels are the most affordable steel 6.01mm tight bore barrels
  • Angel Custom's manufacturing capability provides industry leading accuracy and precision

  • Why 6.01mm?
    With the 5.99mm and 5.98mm bbs going extinct, and with present day match grade bbs being 5.88~5.95 for a better center of mass, 6.01mm became the new optimized bore for maximum range, grouping and accuracy.(BB Diameter Deviation Reference: Tokyo Marui / Excel (5.90+). KSC/Evike Japanese Spec. (5.88+). Matrix, WE, AIM Top, Madbull, Elite Force (5.90+).
    6.01mm barrels also provides less air volume in the barrel, resulting less air needed from the cylinder for each projection.

    Inner Barrel FAQ: If you greatly increase the inner barrel of your AEG, you may want to make sure your gearbox Cylinder is adequate. (For example, if you install a 509mm inner barrel on your MP5, you may want to switch the cylinder to a full cylinder so the amount of air inside the cylinder is equivalent to your new barrel.

    About Angel Custom

    Angel Custom was founded on a mission to promote satisfaction and excitement on the Airsoft battlefield. Founded by Airsofters searching for perfections, it is our joy and pride to present you our battle tested creations. We strive to provide quality products and services that are reliable and trustworthy to be worthy of the trust placed in us.

    17 Customer Reviews

    (Write a review)

    by Cesar O. on 04/15/2022
    "Very easy install and great fit on my semi auto We tech Samurai Edge M9. No other parts are needed to install just use the bucking and nub from your old barrel. There was a very slight wobble while sitting in the hop up unit but a strip of electrical tape fixed that. Also just a tip I use ptfe tread tape on the tiny hop up adjustment screw to help it stay put and keep the hop up consistent. Nice little barrel for a good sale price. Can hit my 12-inch sticky gel target from across the room 25 and 35 steps away no problem.
    by Johnny D. on 06/28/2019
    "I have tried a few other barrels for my we m9 but nothing outperforms this one! I have tried the madbull extended barrel FPS up silencers and nothing even comes close. 10/10 would buy again
    by Andrew R. on 11/19/2018
    "I put the 240mm barrel into my 1911 m1a1. I want to say I had to modify it to make it fit but It's been too long for me to remember. It works amazing for a pistol though. It did jump my FPS considerably though, which I wasn't expecting. A very bad thing for a CO2 pistol that was already pushing 400 FPS. I want to say it's now pushing 440-450. I now run this pistol for long range, A pump shotgun for mid range, and a double barrel saw'd off shotgun for close range. It looks ridiculous but it's fun as hell.

    So assuming this barrel fits then I would say go for it. It's not the best, but it is for the price.

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