Normally I don't go with an unknown company for a build, but there was a sale and the parts were CHEAP.  Yup, I know, I'll get flamed, I don't care go for it.  If this post saves one person from buying from delta team tactical, I'm good with that.

I and a coworker bought 7.5" pistol kits to build a couple range toys out of.  It took over 2 week to receive the parts.

Once we got them major quality issues were noted. Here are a couple of the more serious ones.  The bcg in his kit wasn't properly machined and would lock up when closed on an empty chamber, nothing a little time with a Dremel couldn't fix. The rail on the handguards do not fit any accessories, the slots in the rail are not wide enough.  All the parts have extremely poor surface finishes.
I can deal with the crap generic parts.  I wasn't expecting much.

The unforgivable part is the knock off, shockwave brace.  It's a fake, no name, fucking knockoff.  The company that took the time to develop the shockwave and get it approved aren't getting the money for their work.  I am currently in the process of notifying the proper individuals of this issue in hope of stopping them from further sales.

Cheap parts are one thing, knocking off a patented part that someone has done all the homework to bring to market is another...

you can find a lot of bad about them with one quick google
that said
I ordered from them too because of the rock bottom pricing, I've been very pleased with my purchase from them, it did take a couple weeks to get my order but all was well.