Airsoft GI small logo

Madbull Airsoft SteelBull Stainless Steel 6.03 Tightbore Inner Barrel (363mm)

[SF27][22418 / MB BARL SB 363MM]
( 1 Reviews ) ❤ Add to Wishlist
Orders over $149 qualify for free shipping
Free Shipping for orders over $149 No Coupon needed

Madbull has crafted another gem in its product line with its new Stainless Steel 6.03 precision inner barrels. Their products are renowned for their high quality, affordability, and dependability, so it's no surprise that this Stainless Steel barrel will be a highly sought-after internal upgrade. Madbull takes no short cuts in providing an immaculately finished inner barrel for increased precision and the highest standard of durability. Get the absolute most out of your airsoft rifle by purchasing Madbull's new gorgeous Stainless Steel 6.03mm upgrade inner barrel.

The Madbull Steelbull stainless steel tightbore barrel is the newest product from Madbull, and is a very high quality part for an affordable price. The Steelbull barrel uses a standard barrel exterior profile which makes it compatible with a wide variety of AEG hop up chambers. The largest point about this barrel is that the inner diameter of the barrel measures at 6.03mm, which significantly increases shot consistency accuracy and range wise.

The barrel length is 363mm or right around 14.5 inches

Manufacturer: Madbull Airsoft
Model: 363mm SteelBull Stainless Steel 6.03 Tightbore Barrel
Color: Silver
Material: Stainless Steel
Package Includes: One (1) Inner Barrel
Warranty Length: 45-days
Warranty Handler: Airsoft GI (Warranty Policy)


  • High Quality
  • Improves Air Seal
  • Increases Accuracy & Precision
  • High Strength, Durable Construction
  • For the M4A1 or Similar Length Airsoft Guns

Please Note:

  • Professional installation is recommended. Improper use or installation of upgrade parts are 99% of the time the cause of failures of these items.
  • Please thoroughly inspect any parts for defects before attempting installation. Due to the high possibility of damage from improper installation, we will not warranty parts after attempting installation.
  • Package contents included by the manufacturer may vary

Manufacturer: Madbull Airsoft
Color: Silver
Material: Stainless Steel
Package Includes: One (1) Inner Barrel
see 1 reviews | Write a Review
verified buyer
G. NGUYEN | 2021-10-05
Product Information:
Excellent barrel for the money. I saw a noticeable increase in accuracy and precision after I installed this barrel.


Will this barrel work on a lancer tactical m4 lt02c cqb
It's a 300mm Barrel with an extension

1590 days ago
Nate T

(I have this same question)
Staff Answer:
Yes, it should fit.

1352 days ago
1 answers
1 asked
Search Tags: Steel Bull M4A1 M4 Tokyo Marui ICS JG SRC Cyma Echo1 VFC G&P AGM King Arms G&G Upgrade FPS Accuracy Tight Bore Tightbore

For Questions, Answers and Comments:

Talk about the Madbull Airsoft SteelBull Stainless Steel 6.03 Tightbore Inner Barrel (363mm) with your friends on the facebook comments box below:
Copyright © 2022 Airsoft GI

All airsoft guns are required to have the tip (1/4 inch) of the barrel permanently colored in blaze orange. No person may openly display or expose any imitation firearm (replica firearm), in a public place. The term "public place" means an area open to the public or exposed to public view and includes streets, sidewalks, bridges, alleys, plazas, parks, driveways, parking lots, automobiles, whether moving or not, and buildings open to the general public, including those that serve food or drink, or provide entertainment, and the doorways and entrances to buildings or dwellings and the grounds enclosing them.

Any person who changes, alters, removes, or obliterates any coloration or markings that are required for by any applicable state or federal law or regulation, for any imitation firearm (replica firearm), or device in any way that makes the imitation firearm (replica firearm) or device look more like a firearm is guilty of violating the state or federal law.

By accessing the Site, you certify that you are older than 18 years of age or the age of majority where you live, whichever is older; that you are the owner of any credit card used to purchase on items on the Site; that you are familiar with all local laws in your area affecting your legal right to access airsoft products; that any products you buy are for your own private enjoyment and that you will NEVER share these products with a minor in ANY WAY.