Glock pioneered a revolutionary sea-change in semiauto service pistols. Polymer frame, striker fired, safe-trigger. Makes for a reliable, durable pistol.
Now pretty much every pistol maker has seen the success and gotten on board.
I like them myself. I was an early fan. Bought mine in Gen2 timeframe, around 1994. Have three Gen2, and one Gen4. I have no interest or inclination to retool to another brand.
