DCF stands for Douglas County Firearms. (Douglas County Firearms Guns..... a wee bit rhetorical, eh?)
They are located on wilcox in downtown castle rock, where the old jackson hewitt insurance place used to be (next to the dive shop).
I went in today to check em out, and ended up being pretty impressed.
Very nice guys that run the shop, welcomed me from the start.
They have a myriad of cool toys inside, although mostly handguns, they did have some rifles, and AR parts (handguards, sights, lowers, and a couple AR57 uppers). They are a little overpriced, but that is to be expected from a local business. 30 bucks for glock mags, and 50 for a blackhawk serpa holster. Not exactly the most extensive stock in terms of ar/pistol accessories (compared to bowers or something equivalent), but its still acceptable. The two guys that run the shop (Josh and Frosty) seemed to be knowledgeable, and friendly. Ended up leaving with a glock annual and a little glock 17 keychain (haha). They sell bitterroot ammunition almost exclusively, with a box of 9mm running 13 bucks for the cheap stuff. They also sell bulk packs, with a box of 1000 9mm being $225 from what I remember. I would gladly visit twice from what I have seen so far, and I encourage those who live around castle rock, or those who are passing through to do so as well.
hope this helped,
Kenny