Highly unlikely they'll cancel your order but I've never been able to get them to tell me where their "warehouse" is actually located which leads me to believe they don't have one. I strongly suspect they drop ship everything that says "In stock" from a wholesaler.
TBH, Their inventory accuracy is pretty abysmal. I'd say 1/2 the time I see a part online that shows "In stock: Phoenix" the counter guy says we don't stock those. I pull up the webpage on my phone (Yup, I guess I'm that guy) that shows it to be in stock. They start digging around their computer, "hmm, It does show we have one...let me look in the back" then you wait.
I've had no less than 3 counter guys admit that their website is pretty much hit-and-miss and just because it's on there doesn't mean they have it.
You'll get your gun but you gon' wait. Don't bother showing up until they tell you it's there. Every time I go in, there's a disgruntled customer that ordered a gun weeks ago, assuming it should be ready but of course it's not.
....and thanks for reminding me. They had about 50 BCM RE kits out on the shelf. I need to go grab a few.