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Prometheus 6.03 EG Tight Bore Inner Barrel for Airsoft AEG (407mm)

ID: 24386 (BRL-PROM-407)
Prometheus / Laylax24386
4.8 stars, based on 5 reviews
Prometheus 6.03 EG Tight Bore Inner Barrel for Airsoft AEG (407mm)
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Prometheus 6.03 EG Tight Bore Inner Barrel for Airsoft AEG (407mm)
In Greek mythology, Prometheus created the human race and stole the power of fire from heaven for man-kind. The Myth have little to do with this product but is a cool story Prometheus would like to share with you. Nevertheless, this is an awesome AEG tight bore barrel favored by many. now distributes Prometheus products directly from Japan to bring you the newest version, factory direct pricing and highest quality product shipped to you right here in the USA from the world's largest Airsoft distribution center!

Suitable for: M4-A1 SR16 M4 S-System SIG551 AK47 & rifles sharing similar inner barrel length.
Length: 407mm
Inner Diameter / Bore: 6.03mm
Material: Stainless Steel.
Compatibility: For Tokyo Marui, Matrix, G&P and other compatible Airsoft AEG Rifles
Manufacture: Prometheus. Japan, a part of the Laxlax company.


  • Made from High Quality Stainless Steel
  • Precision 6.03mm Inner Diameter
  • Internally Polished with Precision Crown
  • Made in Japan, directly imported by

5 Customer Reviews

(Write a review)

by Brad D. on 07/14/2015
"Just for a reference to the above by Russel... 407mm is NOT 13's roughly 16.02 inches.
by David D. on 07/03/2014
"Installed in VFC HK 416 CQB. Increased length of stock by approx 107mm, WOW what an amazing upgrade for relatively little money. The BB's rocket from the barrel like a lazer beam. Haven't chrono'd but dont expect any gains/losses of FPS but overall range and groupings increased a LOT. Just a heads up to any 416 owners running stock VFC hop up.....also purchased purple Prometheus bucking and the bucking will NOT fit. It's too thick. Confirmed with tech this is not a good matchup (prometheus bucking and VFC hop up.) Keep the stock VFC hop up which is good quality and fits perfect. Couldn't be happier with purchase of barrel. HIGHLY recommended. Best $50ish you can spend.
by Brendan V. on 03/05/2009
"for every one who wants to know: IT FITS KWA KM4 Tactical!!! Installed this in my gun and shoots pretty accurate well way more then it was stock. What is shooting some one if you can not hit them, right!?!?!? Well I recomend this cause i think it will make your game play performance alot better and exciting. Matrix .2G BB's work better than Echo 1, KSC and Mad Bulls with this Barrel. Recomended Buy It, Shoot It, Love It!

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