Simrell Full Metal Jacket (FMJ) for DynaVap Captive Cap
Simrell
The Simrell Full Metal Jacket (FMJ) is a dedicated thermal accessory for DynaVap Captive Caps, designed to retain and distribute heat evenly. By adding approximately 3 grams of thermal mass, it enables one-cycle chamber extractions and entirely eliminates the need to spin the device during heating. Available in 99.99% pure copper or Stainless Steel, it seamlessly modifies the baseline heating experience. The FMJ offers an accessible, torch-friendly upgrade for users seeking simplified temperature management and altered extraction profiles.
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Simrell Full Metal Jacket (FMJ)
Out of stock ↻ Oct 27, 2026, 6:17 p.m.Learn More
Last Update: October 28, 2026
The Simrell Full Metal Jacket (FMJ) is a specialized thermal accessory designed exclusively for the DynaVap ecosystem by The Simrell Collection. It functions as a precision-crafted metal sleeve that slides directly over a DynaVap Captive Cap, effectively acting as a thermal battery. By significantly increasing the overall thermal mass of the standard cap, the FMJ retains and evenly distributes heat for an altered extraction profile. This accessory is useful for individuals with dexterity limitations or joint concerns, as it removes the need to twirl the device during the heating cycle. Available in multiple materials, it seamlessly modifies the baseline heating experience.
Heat Distribution and Application
Because the FMJ uniformly transfers heat around the cap, it completely eliminates the requirement to rotate the vaporizer while applying a heat source. Users can simply point a single-flame torch directly at the engraved Simrell logo, which functions as an integrated visual target. This straightforward approach provides up to 60 seconds of heat retention, allowing for a full chamber extraction in just one heating cycle without repeated torching.
Material Variants and Compatibility
The sleeve is constructed in various material options, including a 99.99% pure copper version for maximum thermal conductivity, and a Stainless Steel (SS) variant that acts as a robust buffer against accidental combustion. The Stainless Steel version is also compatible with induction heaters featuring a 12mm opening or larger. The FMJ is strictly designed for use with Captive Caps and will not fit older, standard non-captive caps.
Advanced Airflow Manipulation
When paired with a compatible stem, users can manipulate the final extraction density by adjusting the airport. Fully covering the airport increases internal chamber pressure and temperature, which yields a much denser, darker roast. Leaving the airport open results in a lower-temperature extraction focused on preserving natural botanical profiles. The added mass of approximately 3 grams ensures a steady heat transfer throughout the entire draw.
What’s in the box?
- 1x Simrell Full Metal Jacket (FMJ) (in chosen material variant: Pure Copper, Stainless Steel, or 24k Gold-Plated)
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Tags: DynaVap Accessory FMJ Thermal Sleeve
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