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Simrell FMJ for Dynavap

8 reviews
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The FMJ is a revolution in ease of use for all Dynavap vaporizers with a “Captive Cap”.

Simply slide it over a captive cap and it’ll snap into place, eliminating the need to rotate the cap at all. The thermal retention of the copper jacket holds heat for a full 60 seconds, allowing you to get a 1 hit extraction from the dynavap cap.

The Logo on the FMJ is actually an Aim point. Simply take a single flame lighter, point it at the S logo (( making sure the color change of the copper is the same size as the S )) and you will get perfect results every time!

The FMJ accents the cooling of the Simrell Vortex System really nicely.

Meet the FMJ. A Full Metal Jacket constructed to extract a full chamber in 1 heat cycle. Made from 99.99% Copper, the FMJ transforms your cap into a powerful one-hitter. How? Simply slide the jacket onto a CAPTIVE CAP. The FMJ will change the way you use a DynaVap vapcap.

Why Copper?

The use of copper on the cap eliminates the need to rotate your tip to get an even heat up. It acts as a thermal reservoir that holds heat and evenly distributes it, allowing YOU to choose how dense and dark you want your extraction during your first heat cycle.

The copper jacket also acts as a better buffer for combustion, allowing you to worry less about your reaction time after the click. 

Heat It Up

Simrell's signature logo is more than a symbol of authenticity. The logo on the FMJ serves as a visual reference point for your torch.

For the perfect heat up, direct the flame at the Simrell logo. As the copper heats up, it will begin to change color. When this “hot-spot” is the size of the logo, you're at the perfect distance to heat the cap. Once it clicks, you will have approximately 60 seconds to clear the bowl.

Advanced Heat Method 

By covering the airport on your stem, you will increase the pressure and the temperature inside of the chamber, resulting in the darkest roast possible. If you leave the airport wide open during your session, you will have lower pressure in the chamber and get a lower temp less dense extraction. To modify your roast, adjust the chamber heat/pressure by adjusting your airport usage.

Customer Reviews
4.5 Based on 8 Reviews
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Filter Reviews:
Ashley b.
United Kingdom United Kingdom
I recommend this product

Must have for dyna

Almost turns the dyna into a desktop. The amount of vapour you get off a small bowl is amazing. Makes the high stronger, flavour better, and all around much easier to use. Would replace in an instant.

Dan B.
United Kingdom United Kingdom
I recommend this product

Full Mind Judder

10/10 I'm sold ! The best bang for your buck accessory in the Dyna-verse. Makes the Dynavap in to a full proof beginner friendly one heat monster. Pair it with a Matrix sidecart and WPA for a true Full Mind Judder

stuart e.
United Kingdom United Kingdom
I recommend this product

Simrell fmj

Absolutely fantastic service from the team as always, fmj does what it says on the metaphorical tin.

United Kingdom United Kingdom
I recommend this product

Worst dynavap accessory to date.

Bought this and it it useless, it does not extract in 1 hit at all, more like 3+, a standard OG cap works better and produces darker avb in less hits (followed all the vids and everything, it just will not out perform a standard OG cap), I had to threaten legal action to get £10 back which is really shocking, as they were not going to accept it (I should of been offered a refund from the beginning with no issues), I honestly feel let down by vapefiend as it’s the first time they have acted in such a way. DO NOT BUY SIMRELL! . Oh and I've been told by simrell and vapefiend to go past the click lol, if your going past the click for a darker roast then why bother with a useless bit of copper that does nothing beneficial at all (also no mention of this in the advert). If your going past the click these overpriced pieces of copper do nothing to help (just heat a standard cap past the click and same results and you save £10), the Fmj produces very wispy disappointing vapour compare to my older undated OG cap.

United Kingdom United Kingdom
I recommend this product

Next level performance

Just brilliant. I love not spinning the device any longer and instead of three heat ups I get a single amazing one. I run out of lungs before it stops producing vapor. Regular caps without an FMJ are now like a lite version to me. Crazy how much more these jackets add to the experience. HIGHLY recommended.

Robert T.
United Kingdom United Kingdom
I recommend this product

Simrell FMJ for Dynavap

Works as advertised. Enables you to finish whole bowl with one heat cycle. Perfect for use with bubbler as no spinning required so can heat dynavap while it is attached. Nice even roast. A bit tight coming on and off but can be loosened by prying at the split slightly. At £10 I'm very happy with the FMJ

United Kingdom United Kingdom
I recommend this product

Dynavap essential accessory

I used to struggle with spinning the stem while heating a dynavap with a jet lighter...but no longer! The FMJ totally removes the need to spin the stem while heating. It makes it so much easier to heat a vapcap. There is a hefty increase in extraction that comes with the added thermal mass too. Mega clouds

Vapefiend Simrell FMJ for Dynavap Review
David J.
United Kingdom United Kingdom
I recommend this product

Woah - what a difference

I've been a fan of dynavaps for years - bought the original M, 2018, 2019 etc., still have my Ti Woody but even with induction heaters I'd kinda stopped using them... With getting used to a few powerful desktops they just didn't hit enough to really satisfy... but clip one of these on and the difference is remarkable! Not sure if it's extra weight, conductivity or what but all of a sudden my old vapcap was hitting like a train and able to milk a bong properly. The moment my first one arrived I ordered a couple more for friends - highly recommended! :)



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