I think you might get some "inspiration" from some online shooters regarding weapons. Weapons with a realoding mechanics are generally OP guns meant to kill in a few shots. Ofc dev's can put whatever they want in the single player mode...
This form of "Inspiration" for weapons is not needed. The PnP game has hundreds of weapon in it already, ranging from pocket knives and .22 derringers to orbital laser artillery and nukes. A lot of the weapons used in the real world are also available, (at least the ones that were developed by the time the books were written.)
A big part of firearms tech in 2020 was caseless ammunition. It was in development since the 1960's and there was a lot of about this technology in the 1980's and into the 1990's. The ammo could weigh as little as 1/3 of the same calibre in the cased format but the issue of fouling the weapon made it too unreliable. There hasn't really been much progress on it since, but at the time it was the next big thing.
I like the idea of laser weapons. And you can even add ammunition to them if you say that the tech has been invented to efficiently store the population inverted element is a chemical matrix. Meaning that you could have throw away cartridges for a chemical laser instead of having to plug in your solid state laser to recharge it. Or perhaps you carry a battery that can store more than 6d6 worth of damage. I don't remember off the top of my head the rules for lasers and damage but as we used them in the PnP it was halve the armor SP and full damage on what got through.
I would put their availability at uncommon or restricted and I don't think that they should be concealable.
Lasers in 2020 used Capacitor Batteries and they could provide a variable amount of damage. They had a base 'pool' of ammunition (as an example, the ACPA "Photon" Laser Cannon had 30D6 worth,) and they could deplete a variable amount each time it fires, (in the case of our example it could fire 1-10D6 worth each trigger pull.) All lasers were counted as AP, meaning all armour was halved, but so was the damage.
Laser weapons in 2020 were tempramental and unreliable. Not to mention expensive and were often out performed by standard ballistic technology. They were a niche weapon, normally used in space conflicts.
My main question is do we think that laser tech would be abandoned, the same way caseless ammo development was in the real world, or would it be refined and honed into a more practical format?