Perfectly normal. There's a little keeper pin that's near impossible to see but the pin spins freely.
Some are solid and don't spin. Off the top of my head and with limited memory capacity I don't recall which models do and some don't.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."