Monk Customs Inner Barrel 165 mm - 6.03

Monk Customs Precision Inner Barrel – 6.03 mm Stainless Steel (165 mm)

Monk Customs presents a high-performance 6.03 mm stainless steel precision inner barrel, engineered for maximum consistency, durability, and accuracy.

Manufactured in Europe using a precision-drawn micro stainless steel tube, this barrel is produced to meet the highest standards for competitive platforms.

Each unit is finished through an advanced multi-step process:

High-precision CNC machining

Straightening & calibration

Internal reaming for perfect bore uniformity

Lapping for ultra-smooth airflow

Ultrasonic polishing for a flawless internal finish

100% Tokyo Marui Compatible

This barrel is built fully to Tokyo Marui specification, ensuring perfect drop-in fitment for Marui-based platforms and all TM-compatible builds.

Technical Specifications

Length: 165 mm

Inner diameter: 6.03 mm

Outer diameter: 8.51 mm

Material: AISI 304 stainless steel

Compatibility: 100% Tokyo Marui spec

European-made precision. Monk-level consistency.