Yes, you could use a Genesis-style RBA like the RSST on your Silver Bullet. Having used Genesis-style RBA's in the past, I would strongly suggest using instead a Kayfun-style RBA like a
Russian 91%. It is a better tank design, easier to build on, and will not have as high of a learning curve as a Genny will.
You could also use a
rebuildable drip atomizer like a IGO, Phoenix, Patriot, or Tugboat.
Information Resources for Your First RBA
You already state that you know that you are not supposed to stack batteries. If you are you looking for us to approve of unsafe battery practices you will not find that here. Enough said.
There was a time years ago when some folks stacked batteries for higher voltage in a mechanical mod (like yourself).
With the advent of regulated voltage mods, this practice was no longer necessary nor recommended for mechanical mods. You could also use a
Kick in a mechanical mod which would turn a mech into a regulated mod. Both methods are a much safer and effective way to experience higher voltage vaping.
With the advent of rebuildable atomizers, the "experience" of higher voltage could be realized by building sub-ohm coils on mechanical mods, but this necessitated the use of high-drain, safe-chemistry batteries such as IMR and IMR/hybrid batteries capable of providing high amperage (up to 30 amps continuous discharge rate).
Battery Basics for Mods
As stated above, you can indeed use RBA's on your Silver Bullet, but you must not stack the batteries you use as they will not have the amp requirements for a RBA and will surely
drive them into thermal runaway. Doing so would be catastrophic!
I build 0.6 ohm coils on a Patriot and IGO-W rebuildable drippers for my two Silver Bullets. HOWEVER, I am NOT STACKING BATTERIES and frankly do not need to with my setup.
I am using a 30 amp battery (
Sony 18650 VTC4 2100mah 30 amp battery) which AltSmoke sells, a high-amp/high-drain/safe chemistry battery. I assure you that I am making tons more vapor with this setup than you could ever get stacking batteries with RCR123 batteries and getting at least 3X the battery life with a single battery.