Tri-Lakes Shooting Supply
Located in Monument.
I bought a LPK from them yesterday, and when I was building my lower, realized that I was missing a disconnector spring. Went back today and told the guy that I can't say with 100% confidence that I didn't lose the spring, but was pretty sure that it didn't come with the kit. He said no problem, and gave me another spring for free.
Everybody I've talked to that works there has been super friendly, and they have a nice selection of ARs and polymer pistols, along with hunting stuff.
If you're in the area, I would recommend stopping by. Will definitely do business with them again.
Oh yeah, and the bbq place next door has excellent brisket tacos.