Monk Customs Inner Barrel 141 mm - 6.03

A precision 6.03 mm stainless steel inner barrel, designed for consistency, durability, and compatibility with Tokyo Marui platforms.

• The description claims the barrel improves consistency and accuracy.
• The description claims the barrel is built to Tokyo Marui specifications.
• The description claims the barrel guarantees maximum mechanical resistance and zero surface oxidation.
• The description claims the hop-up window works with both standard and modern flat-hop style rubbers.