I have heard concerns about this pistol, none, not 1 from me. Excellent functioning with a wide range of ammo, inexpensive for hours of fun at the range!

one thing i can say about buds gun shop. they have very good service. they ship your orders out promply. out standing service.

This Sig Sauer pistol is great .. and as always , Buds is fast and friendly .. and ships on time in perfect manner ! !

There has been a lot of bad press about this great little pistol, but I have no idea why. If you strip it and clean all the factory gunk out of it and lubricate it before shooting it, and use only quality non-hollow point ammo, it works beautifully. Excellent fit and finish, smooth and accurate. I only had one failure, and it was the ammo (dud) and not the pistol. It may not like cheap ammo, but it really doesn't like cheap hollow points. CCI hollow points feed fine, because of the small hole on the bullit. But winchesters have a much larger hole and it gets caught on the rim of the chamber as it tries to feed. Use the right ammo, keep it clean and oiled, and you'll love this pistol.

The sig mosquito is great, shot the hell out of it the past 3 weeks and no issues at all. Shot over 300 rounds of CCI with everything working great. Buds guns were......exceptial.

This is my first purchase from Bud's, and I'm certain it won't be my last. Communication was great and shipping was very prompt to my FFL. Like many others have stated with the Sig Mosquito, and Sig themselves, this gun is very particular about it's ammunition. On my first trip t"o the range, I fired CCI Mini Mags exclusively through the Sig and had several issues with FTF and FTE rounds. By my own fault, I neglected to change the spring from the "normal" to "high velocity" spring before heading out to the range the first time. On my second trip, with the "high velocity" spring installed, the CCI Mini Mags cycled through flawlessly (or nearly flawlessly). After I ran through around 150+ rounds of the Mini Mags, I did a quick cleaning of the pistol and attempted to shoot some Federal Bulk. All I can say about that is, my Sig does not favor the flavor of Federal Bulk Pack. After using both springs and almost a complete cleaning on the bench, I rarely was able to fire two rounds in a row with out a FTE. So it looks like I'm off to store to stock up on some Mini Mags, atleast until this gun is well broken in. Only because of the extreme difference between firing the 2 types of ammunition did I downgrade this from a 5 star purchase.

A lot of people slam this gun because it needs high quality ammo. Most .22 pistols require high velocity ammo to cycle properly and the Mosquito is no exception. I ran Mini-mags through mine (as recommended by SIG) for the first 2000 rounds. Now that it is well broken in it will run on just about anything, including white box Federal from Waly World. I've got well over 6000 rounds through it with no problems. This is a great tactical trainer.

got this handgun about a week ago, went to NRA range. gun feels nice but will only shoot CCI mini mags. the Remmington jammed like no tomorrow. the fired case will not extract. overall it is a nice gun but wish it isn't so picky about type of ammo.