Spoiler reply:
The flamethrower (Incinerator) is present in the game code, but not officially available yet to purchase as technology. Because it is present in the code, it has already become available on multi-tools you can find. I guess HG did not foresee this happening.
I got one on the PS4. 
Here it is in action
Is the secondary MT broken? I canāt seem to find mine and I cannot purchase another. When trying to equip my second one, I get a list of options for my primary MT like Plasma Launcher, Personal Forcefieldā¦
in normal PC [not experimental] - I had 2 MTs - was checking the 2nd one out today to get different weapon/config to use for derelict freighters but didnt like the class C, so went looking and found a new class A [ie total of 3 MTs], and kitted it without any issues.
dummy me. I have been using the same MT and flying the same Living Ship for so long, I had forgotten how to access my other MTs, (I have 3) and I had forgotten how to maintain a regular ship, lol. 
Well, I am having all kinds of issues in 3xperimental right now. I will post it all here since this may not affect normal players. The issues all seem to involve underwater thingsā¦which makes me wonderā¦
First, the Abyssal monsters seem to just vanish in a puff when I engage them.
Second, I cannot recharge my underwater tech via the quick menu. They do not appear in the quick menu.
Also, I have been having a glitch with the Remembrance rooms. The one where you see the Atlas count down from 16 minutes until its end. Then suddenly, one of them worked today. Before that, when I ran the diagnostic, it simply endedā¦that was that.
I also had a strange feeling when one did work for me today. I am wondering if what the Atlas sees in its own end is the end of NMS developmentā¦
and lastly, for now anyway, I was in a MP mission and when I left the Anomaly, he was in my team and then he wasnāt.(He did not leave, just booted him out) I finished my mission and when I went to re enter the anomaly, my game frozeā¦
Well end of development was not a happy thought 
One more glitch, when I finished all of my missions and left the Anomaly, it placed me in Euclid instead of back in Severates. Thankfully, the teleporter fixed that but I had a panic attack for a minute, lol.
Oh and this happened in my ship
After the last experimental update, when I blast a Humming Egg, it just vanishes. No animation and no āloot.ā (Iām nearly always in Creative mode now for exploring and photos). Iāve submitted a bug report.
Uhmā¦ Are you supposed to blast them? I thought you had to pick them with āEā? (Humming eggs are the ones containing pearls, right?)
Experimental Branch Update 20/07
For other objects that you should gather via āE,ā trying to mine or blast has no effect. So, ā¦
why is this different. I donāt recall this behavior prior to Desolation.
Ah, you mean theyāre destructible now? Yeah, that would be new. Unless youāre using the terrain manipulator, in which case I think itās normal?
The recharge water tech problem has been an ongoing intermittent problem for a few releases.
I guess it has been a while since I went for a swim. I am fairly certain it was working during the last underwater Weekend Event
Experimental Branch Update 21/07
Well that must have been a lot of fun! I wish I could have experienced it. 
Wait. The game allows the entire freighter to get destroyed!?!? I need to see this.
