There is no doubt that Ronon possessed the raw aggression to turn the tide of a firefight, and this was partly due to the power of his blaster. Ronon Dex’s blaster (henceforth the RDB) was given no explanation or backstory in the show. We never learned how he came by it, or how long he’d had it, but the RDB was easily the most powerful sidearm in the Atlantis series. John Sheppard discovered a similar weapon during his time with the Travellers (a nomadic, matriarchal society who seemed to select their leaders based solely upon how hot they looked in a leather bodysuit) but the energy cell was depleted, rendering the weapon useless.
Sure the glowing energy cell at the rear of the barrel was a bit counterproductive when it came to sneaking around in the dark, and sure cell depletion could be a problem, but Ronon always came prepared with spare cells, and he sure as hell never ran out of juice on an important mission. All this and it also had a stun setting! The RDB was the envy of everyone who regularly undertook off-world missions for the SGC, and it basically made standard-issue automatic weaponry look totally pissweak by comparison.
I want a RDB. I want one soooo much.