Should a jext simulator pen sting and leave a mark?

[Monkeyandanimal]

I have just been given a jext simulator pen as my son appears to be allergic to peanuts; when i tried to practice with it on my leg it definitely stung and there was a ring of red dots on my skin; is this normal? Surely the practice pen shouldn't leave a mark?

Yes, it does. We have one and we ping ourselves regularly with it. It's just the spring pushing something out with force. It's not strong enough to pierce skin though.

sounds normal.

lets not forget that the real ones give a bit of bruising anyway, not that we will be bothered about that at the time!

Thank you for those replies; this is all new to me! Feels like a big responsibility.