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I have one and the DA trigger is tough it will get a little better with usage but the good thing is you most likely will not use DA that often you may check with ATI as the still sell this gun as the firefly and see if they have any suggestions mailto:customerservice@americantactical.us
here is a article that may help https://triggermeister.com/sig-sauer-mosquito-hammer-spring-replacement/
Michael, you could send it in and have the trigger greatly improved by Bill Springfield [Sig Mosquito, pull weight is reduced up to 2lbs from stock, SA pull is smoothed up and has a crisper hammer break. Magazine disconnect is removed, price runs $59 only the lower frame is needed.] : ---- http://www.triggerwork.net/sigp2xx.html