I bought a new RadioMaster Ts16 X about a month ago.  The other day, as I was getting ready to arm, I made sure all the switches were in the down position.  As I flipped the momentary switch it broke off the transmitter, right at the base.  
My dilemma:  do I ask for replacement under warranty, or just forget it?  There are too many switches for FPV flying, and I have no issues moving the beeper to anther location. In fact, I was already thinking about moving the beeper to the flip-over, three-way switch.  The Radio Master works great in every way so how would you advise me to proceed?  
BTW, I bought it from a reputable dealer in the US, so I am not looking at a return to China.

as its brand new, i would ask for a replacement.

you should at least get a replacement switch or a few bucks from your shop, for the next buy.

Did it only break the switch or did it break the plastic body of the transmitter?

It was just the switch lever. The spring was still inside the toggle.

if that's the case then i would say contact either the retailer and see if they can send out some switches, or if you'd have to file a claim with radiomaster. i don't think either will require you to send back the transmitter to address this issue, and most likely will just send out a replacement switch

You may have knocked the transmitter and smacked the switch on something which weakened it. Then when you went to flip the lever it probably just came off because the metal at the base of it was already fatigued. I tripped over my transmitter the other day on grass and just that caused the arm switch to break off like yours did (see HERE).

if there was any force to it, but otherwise they probably still know that issue and its a bad badge.
i opened my transmitter many times, but as there is some risk to damage something else i wouldnt like a switch as a replacement if it is truly a faulty switch, i would like a fully replacement for a new product.
a switch is a few bucks, this wont be a problem anyway.

I appreciate your suggestions.

I broke the same switch on my TX16s. I ordered a new switch from DefianceRC and replaced it myself. It was an easy drop in replacement.