Sell that Sigma....I had one as a duty weapon for about 2 weeks (while at the police academy) Pull the trigger wouldnt go off, pull it again and when it gets to the end of the pull give it a yank and boom!!!! I gave it to the academy for a demo for them and went with the Glock Model 22, .40 shot 93% on my first qualification, out of 50 rounds......hope this helps, I contacted S&W and they said they had trouble with the triggers with them.....