First Factory 6.03 M4A1 MWS Inner Barrel 250mm

The First Factory 6.03 M4A1 MWS Inner Barrel 250mm is a precision upgrade for the Tokyo Marui M4A1 MWS platform. With a 6.03 mm tight bore diameter and high-quality finish, this inner barrel has been designed to noticeably improve shot consistency and grouping, without compromising on reliability.

A targeted upgrade for MWS users who want to take their GBBR to the next level of performance.

Materials and construction

The First Factory 6.03 M4A1 MWS Inner Barrel 250mm is made from high-quality steel with a precision-polished interior. The 6.03 mm bore ensures more efficient airflow around the BB, resulting in less air loss and a more stable energy transfer.

Measuring 250 mm in length, this barrel is suitable for compact MWS setups where a good balance between manoeuvrability and precision is required.

Performance and compatibility

This inner barrel has been specifically designed for the Tokyo Marui M4A1 MWS platform and compatible variants with the same barrel length. Thanks to its tight tolerances, the barrel delivers improved grouping and consistent performance at short to medium ranges.

When combined with a high-quality hop-up bucking and premium 6mm BBs, the system can perform at its best. Depending on the rest of the setup, there may be a slight increase in FPS due to the improved air efficiency.

Key features

• 6.03 mm tight bore diameter
• Length 250 mm
• Suitable for Tokyo Marui M4A1 MWS
• High-quality steel construction
• Improved airtightness and efficiency
• Tighter grouping and better consistency

Safety and recommendations

Use only high-quality 6mm BBs to prevent blockages or excessive wear. When installing, check that the hop-up unit and outer barrel are correctly aligned. Incorrect assembly may affect performance.

Why choose the First Factory 6.03 M4A1 MWS Inner Barrel 250mm?

The First Factory 6.03 M4A1 MWS Inner Barrel 250mm offers an immediate performance boost for your MWS platform. Improved grouping, more efficient airflow and consistent shots make this a solid upgrade for serious MWS users.

Frequently Asked Questions

Is this barrel only suitable for the MWS?
Yes, it is designed for the Tokyo Marui M4A1 MWS platform and compatible models.

What is the advantage of a 6.03 mm bore?
Better air efficiency and more consistent shots.

Will this barrel increase my FPS?
A slight increase is possible due to more efficient airflow, depending on your setup.

With the First Factory 6.03 M4A1 MWS Inner Barrel 250mm, you can achieve greater accuracy and consistency with your MWS setup.