Jakor wrote:My Sig Mosquito has taken years to break in. It's a fussy fussy firearm. I would not buy another. The slide is too heavy for the round. Lots of malfunctions.
I had a Mosquito years ago, and was very grumpy at how poorly it functioned with every brand of ammo that I tried - intermittent fail to extract and eject. I cleaned it and was getting it ready to ship in for repair when I found a yellow sheet of paper in the case, cleverly hidden between the case and the foam. I was an addendum to the manual that detailed a lubrication hole on the slide. So I added a few drops of oil and headed back to the range - worked flawlessly. I found the following FAQ at Sig's website, hope it helps.
"My mosquito pistol seems to have problems ejecting & extracting?
Please try these basic trouble shooting tips before requesting service: *Please make sure the recoil spring is installed correctly. The narrow end of the spring MUST be on the guide rod first…pointing towards the rear of the gun. If it is not, this will cause feeding, extraction and firing issues. *Like many .22 LR’s, Mosquito’s can be sensitive to ammunition used and to cleanliness and lubrication. Be sure your Mosquito is cleaned and lubricated regularly and before the first use. *There is a lubrication port on the right side of the slide for the extractor, be sure you add a drop of lube in this hole every hundred rounds or so.
Make sure the gun is very clean. *Some Mosquito’s benefit from a break-in period. *Be sure to use factory recommend ammunition – CCI Mini-Mags. Winchester Super-X, Remington Golden Bullet, Federal High Velocity etc…also usually work well."
"The Constitution shall never be construed to prevent the people of the United States who are peaceable citizens from keeping their own arms."
- Samuel Adams, Massachusetts Ratifying Convention, 1788