James, not a practice I would condone if this is what in fact happened. It ships with two from Kel-tec so I would contact Buds Customer Service to see what may have happened at 1-859-368-0371 9am-9pm EST Mon-Fri. or use the Blue Chat now button at the bottom right corner 9am to 9pm Mon - Sat and 9am to 7pm Sunday.

James, you don't say exactly which model you bought, but if you bought this one budsgunshop.com/product_info.php/products_id/64077/kel-tec+cnc+pmr-30+30%2b1+22+mag++43%22 it only comes with 1 magazine.

I hate pandering to cry babies, for one have you even tried contacting buds or keltec to see if they'll replace the magazine? Don't answer that i know you haven't.
And for 2 it says all over the place when your ordering a pistol that YOU are responsible for checking the item before initiating the transfer, and to contact buds before even paying the transfer fee or starting the background check, but rather then take responsibility for anything In your own life or try to make it better you want to just cry and scream foul. Solid move, I know not the brown nosing "there there it'll be ok, stroke my hair and tell me I'm pretty" answer you wanted, James G will be along shortly with that.