Not that anon, but
Really depends on the infrastructure behind the weaponry, current technology, economical climate, etc, etc.
Assuming you got your tech high enough, it may be possible that it's cheaper to mass produce a bunch of micro computers that all have the same basic design and some one-size-fits-all batteries then just throw them at people. Maybe tweak it a little for aesthetic purposes, beam intensity, grip, whatever. You may even be able to design the weapon equivalent to burn phones so that you shit out tons of overclocked laser pointers en mass for whatever two-bit PMC you feel like supplying. Once societal infrastructure goes that far, it's cheaper to work with pre-existing designs and refine them, so even high quality weaponry would tend to use lasers.
What this means though is there would have to be a major societal shift where everyone just fucking decided to drop conventional firearms in favor of lasers (or plasma, or bio-weapons, or anything you care to tint your setting for), which realistically isn't going to happen without DM wankery, unless - I don't know - there's some kind of major fucking materials crisis that forces us to make all our shit out of plastic or some shit.
That also wouldn't dissuade people from making their own weaponry, because Tom Garbageman in the middle of Bumfuck Nebraska probably isn't going to know how to set the focusing lens just right and program the energy sequencer, but balancing gunpowder is a more reasonable skill to pass down through average civilians provided they have the necessary tools. In that instance I could see conventional firearms having a heavier presence among the lower class, rural, and criminal markets.
So there, I made up some shit to justify Anon's statement, though he's still a dumbass who's drastically oversimplifying and it all heavily relies on Factors.
Although, thinking about it, I wouldn't mind seeing a setting that had this amount of backstory to its weapon history.