hit or miss
I have one in 9mm. Can't get it to stop. 500 rounds of mixed ammo (HP,lead,ball;115-147) without cleaning, just a couple of drops of CLP on the slide rails, then a weekend steelplate shoot. No problems. Biggest downside is the no +p rating, which is not a problem in 40. Sigmas seem to have/had a QA problem from the wide range of reports, good and bad, seen here at TFL. Which side will this Sigma fall into is anybodies guess. How good is the price, how much can you spend, and will this be your only pistol are all questions to answer before buying. Good luck and keep us posted.