The one and only complaint I have about the SP101 in 327 FM is the rear sight. WTF was Ruger thinking? Why didn't they just mill the rear sight like they do for the 357/38? I have broken that rear blade twice while carrying IWB. The fact that I'm becoming a bit of a pork chop with a dickey-do belly (that's where your belly sticks out more than your dickey-do) may be the reason, but if the rear sight was milled, it wouldn't have happened.