i think it's a numbers thing. glocks probably sell more. i mean, who hasn't heard of glock? the non gun enthusiast knows about glocks. tommy lee jones said, "don't get none of that nickle plated sissy sh*t. get a glock. they'll fire under water." oh, well i'm sold if it fires under water. and how many models does glock have? covers just about every caliber in full size, compact and subcompact. and i have to agree with JerryG, it's a good first gun. maybe not the best choice, but still. for the reputation of customer service and reliability. the "high cap" stigma. for these reasons they sell. and the gunstore wants to sell guns. and they are affordable. the range i go to has three shelves of glock rental guns, and five shelves for all other brands. there's probably a reason for that. i bought a glock, even though i don't find them aesthetically pleasing at all. because they're affordable. i wanted a 10mm, but didin't want to spend $900+ for one either. but i think mostly it boils down to brand recognition. there was a time when denim jeans were called Levis, and i'm pretty sure that lip balm is usually called chap stick.