Optimist Mods Moth RDL/DL Barrel Cap

The Optimist Mods Moth RDL/DL Barrel Cap is a precision-engineered upgrade accessory designed for the Moth Boro RBA, allowing users to transform and refine their airflow experience for a more open, performance-driven vape.

Machined from high-quality stainless steel, the barrel cap replaces the standard top section of the Moth RBA, increasing internal chamber space and reshaping airflow dynamics for restricted direct-lung (RDL) and direct-lung (DL) vaping styles. This larger airflow path reduces restriction and enhances vapor production while maintaining smooth, controlled delivery.

Designed with performance in mind, the cap works in harmony with the Moth’s airflow system to provide a looser draw, improved airflow volume, and increased cloud output, making it ideal for vape juice users who prefer a more open inhale without sacrificing flavor quality.

The precision fit ensures seamless integration with the base RBA, maintaining a secure seal and consistent performance during use. Its durable construction also helps manage heat more effectively during higher-wattage or more aggressive builds.