New to this forum and just got some great info on modifying the trigger on the MP 45 I just bought (thanks Dan!!!). Anyways I realized that I had a Sigma in the safe that I never shot because the trigger was so bad that I could not stand it. I have built several 45's ARs and 10/22s but the MP was the first plastic gun I messed around with besides the simple glock stuff. The MP gave me some confidence so I started tinkering around with the sigma and was able to make some significant improvements very easily. I have not seen any action in this section for awhile so if anyone is interested let me know and I will post pics and instructions. I would love to hear what everyone thinks.