Sig Mosquito NO BS

Had some feed issues depending on which recoil spring I had installed. Pretty much figured out which ammo goes with which spring now. CCI Mini Mag is great.

Grips and ergonomics are great.

Trigger sucks.

Pretty accurate but not a target gun by any means.

Three front sight posts come in handy depending on how you plan to shoot.

Overall I'd give it a C+. I paid $300 for a used one. Nothing to say "don't buy", but on the other hand, nothing to say "rush out an get one"

We had one for a range rental. Very ammo and dirt sensitive. It was a constant jammer which is a problem for a rental so we got rid of it. The range manager doesn't want to try one again. It's back to the Rugers.
Only 1 gun but it's actual experience.

Mines been 100% with everything I've put in it. I'm using the spring that was installed when I bought it. I mostly shoot some old Winchester Super X that I have a bunch of.

The DA trigger takes a little getting used to, as its a tad heavy and the shape is a little different than other SIG's, but once you get used to it, its not bad.

Mine went back to Sig to have the safety replaced after it blew off the gun. It's picky about which ammo it feeds and doesn't feed but it is a fun gun to shoot.

The wife wanted a .22LR and most 22's have HUGE grips and she has very small hands. She couldn't really get to liking my Buckmark Target.
So, she bought (with her money) a Mosquito, it fit her hands well, etc
as someone else said

• Grips and ergonomics are great.
  
• Trigger sucks.
  
• Pretty accurate but not a target gun by any means.
  
• and if you have a Sig as your carry gun it's the perfect pracitice piece because the manual of arms is the same.

However, it would ALWAYS fail to feed the 1st or 2nd round off the top of the magazine. She got very good at tap-rack-bang drills but meanwhile I was kicking her butt at the dueling tree.

She called up Sig, sent it back, Sig sent a new one in less than 2 weeks.
That one ran perfectly and never had an issue but she felt it was tainted by assocation and traded it in on a Kimber 22LR 1911

Oh yeah, extra magazines are unbelievably expensive.

i concur with some of the earlier posts.

i need to keep the pistol clean for it to function properly(more so than my other guns).

great ergonomics.

trigger sucks(not sure if sig does action jobs on these, anyone know?).

sights are cheap and look like they got it off a toy gun.

right now, my favorite .22 is my walther p22, but the grip on the p22 is too small for my hands(mosquito fits like a glove). the p22 also feels more like a real gun when shot, the mosquito feels like an airsoft when shot. if they could make a .22 with the best of the p22 and mosquito that would be my dream gun.

Online I keep hearing how Sig Mosquitos (and various other Sigs) are great for small hands. You could not prove it by me.

Couple weeks back, I spent several hours watching over a woman with medium-small (not even small small, just medium small) hands as she fought with her Sig Mosquito. She simply could not reach the controls, and also had a difficult time with accuracy because the gun was, well, just too big for her hands.

While I was watching her, I realized I had very, very rarely encountered a woman whose Sig actually fit her hands properly. Mosquito, 239, 229 -- whatever. They just didn't fit small hands right in most cases! Even when the student raved about the gun you could just look at the way the gun fit in their hands and see why they were having more trouble shooting than they should have. And that's because most people simply don't know how to make sure a gun really fits. Everyone knows what feels good or doesn't feel good, but gun fit isn't just about what feels good. It's also about what points naturally, whether the gun naturally lines up with the long bones of your arms, whether you can wrap your hands firmly around the grip, whether you can easily manipulate the slide, and whether you can reach the controls.

Don't get me wrong. I think Sigs are fine firearms.

I just don't buy the online legend that many of them are good for small hands.

pax

LOCKTITE

I had to locktite my safety in and the dissasembly lever. After about 200 rounds it loosened up so it would not work. After that swapped out the heavy spring for the light one. Then started shooting CCI mini-mags. Works great finally.

Also stretch the mag springs some are very light from the factory if they have more tension the whole gun works much better.

Actual experience, no BS, from a guy with SIG in his screen name, RUN!!!

I bought one and it would not reliably feed anything I fed it, from the cheapest Wal Mart bulk stuff to high dollar competition ammo, I never had more than 3 or 4 rounds feed before some kind of stoppage.

I was about to send it in for repair when I tried a P22 and I just sold the Mosquito outright and never looked back.

I hate that too because I really wanted to like it since I shoot Sigs of every other kind.

I really like mine. I'll agree the trigger could use some work but I have run over 1200 rounds through mine this week with very few problems. FTF's and light strikes but nothing I would consider excessive for a .22 semi auto. The ammo is too unreliable to blame all these issues on the gun. I have the red dot mounted on the bridge mount and it works great. I didn't buy this gun to drives tacks I purchased it to have fun with and use as filler at the range in between shooting other more expensive ammo. In a week or so it will be fitted with a suppressor and more fun will be had.

I agree Sig could have done a better job with the trigger but it is still a blast to play with.

MAN, I really wanted this gun to work! It is the perfect .22 ... on paper. It was without a doubt the most disappointing gun I ever owned. For what it cost and coming from a premier gun maker, I had very high expectations. However, the gun jammed a lot, the trigger is one of the worst, maybe the worst I've ever owned. It seemed to have quality parts here and there mixed with cheap parts all over. If Sig ever figured out how to build this gun to high standards I'd buy one again. But...

If Sig ever figured out how to build this gun to high standards I'd buy one again. But...

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I dont know that SIG is actually building them, just like I dont think Walther is building the P22. When you disassemble both and compare them, they are very similar.

Yep, but mine was only OK accurate.

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I think you need to decide what your looking for before you buy any of them. The Mosquito and P22 are not target pistols by any means, nor are they trying or claiming to be. They are more than accurate enough for casual plinking, and if you want a gun that closely simulates your carry pistol, the Mosquito works very well, even with its somewhat odd and heavy DA trigger. Once you've played with it for just a short while, you dont even notice it. Then again, if its bugging you, and you continue to dwell on it, you might as well just get rid of it, as it will never get better in your mind.

Oh yeah, extra magazines are unbelievably expensive.

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What other .22 pistol mags have you bought? The SIG's is $29. Rugers go for around $24, Browning Buckmaks are around $26, and I believe the Kimber mags are around $32.


I'm curious, but how many that had problems with their Mosquito (it was YOUR pistol and you did give it a good chance, right?) tried different ammo/spring combinations, what are your cleaning habits, and what are your experiences with .22's in general. I've owned .22 pistols of all types from most of the major makers over the years, and they all were finicky with ammo they didnt like, even more so when dirty, and usually all of them started to act up not long after shooting 2-300 rounds. .22's in general are also not the most reliable and consistent, when it comes to firing, and I have yet to shoot any of them with out a "fail to fire", which had nothing to do with the gun, but was ammo related.

I also find it kind of amusing that the Mosquito is junk, but the P22 is great, and vice versa, depending on who you talk to. Both are basically the same gun internally. I own both, and both have been flawless, and I guess I've been lucky, as neither is very ammo picky. Both dont like low power "target" type ammo, but then again, both recommend "hot" ammo be used. They both do come with two springs to adjust for ammo of different power, and both of mine seem to work well with the lighter spring that came installed. Both also came with extra front sights to allow you to zero ammo that works best fairly closely. For all that had troubles, both accuracy wise and function wise, you did make use of these before you declared it trash, right?

AK103K,
Speaking for myself, I always give my guns a fair shake. I experiment with many brands of ammo, keep my guns spotless, I actually read the manuals. If I remember correctly my mosquito had SIG printed right on it. Who made it...Sig said they did. No matter what spring, no matter what ammo, the gun was not reliable. I wish it was. If it worked I would probably have overlooked the horrible trigger.

I purchased a P22 to replace the Mosquito. It so far has been reliable. While it is in no way a high quality gun, it was less expensive by a fair margin and at least works. I too own several other .22 caliber guns, among them Beretta. a Colt Woodsman, Browning and a S&W K-22. A pistol, any pistol, any caliber, any brand, should work when properly loaded and lubed right out of the box...period. The Sig didn't, at least the one I had didn't, as well as countless others that owners that have reported on in the gun forums with "bad news" stories.

It didn't fail because I let it down. It failed because it was a poorly made gun. I repeat, If Sig would make one that worked, I'd buy one. There are many fine .22 pistols available and the failure rate I experience with them is not worth mentioning.

usp9,

Glad to see we both believe in good firearms hygiene.

Mine too has SIG on it, just like my P22 has Walther (and S&W) on it. Since you had both, you know that both are basically the same gun under the outer shell. Both are basically the same design, they both come apart the same, and go back together the same, and in my case, both work exactly the same, which so far, has been flawless. If one is trash, then the other is its twin sibling. If both companys actually made either of them, I'd be very surprised. I'd be more inclined to believe they contracted them out and the someone else made both for each.

Sorry to hear yours didnt work. My experience, and those of a couple of my friends with whom I shoot, some of who also have both, have all been positive. I guess we all must have just lucked out. I'm just glad I didnt believe all the negative hype I've read on the web, I'd have missed out on a couple of fun little pistols.

Actual, personal experience: Would only function with Federal Game-Shock ammo in the plastic boxes (cardboard box version no good). Sent it back to Sig for repair, waited 4 months and they sent a brand new gun. New gun had the same problem and I sold it to Gander Mtn and cut my losses.

I'm just glad I didnt believe all the negative hype I've read on the web, I'd have missed out on a couple of fun little pistols.

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Hmm. I guess that's right. But I must say, to an observer with no dog in the fight (I'm happy with my current .22 handgun), this is an eye-opening thread. Very rare to see this kind of concentrated dissatisfaction from owners and users of a firearm by a reputable maker.

Hard to see how the thing couldn't be hurting SIG's brand.

just like I dont think Walther is building the P22.

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I believe that the P22 is built by Umarex who owns Walther.

I've played with several. The trigger and sights are C-R-A-P CRAP. It costs more money than a Ruger MkIII or a Browning Buckmark and is vastly inferior to both of those guns.

I had tried a friend's recently purchased Mosquito a couple of weeks ago. IIRC the ammo used on that day was Rem Thunderbolts. On my turn at the wheel, I had to hand cycle 9 out of 10 rounds. The slide was not cycling fully. Occassionally, an empty case would not eject and no successive rounds were stripped from the mag. Higher recoiling ammo would have solved the problem and the gun probably just needed a little break-in time with that ammo to lighten the recoil spring a little, IMO at the time. This was confirmed when my friend continued to shoot it at another outing (me not there) using Aquila hyper velocity.

Personally, I liked the gun (for the short time I had worked it). The trigger didn't seem to be too bad, at least his sample, but I did not try double action. Poor reports from the web have what kept me away for the time being. I hadn't seriously examined the detailed points of the gun, however (build quality), as it was not out for very long.

In my Mosquito the Remington golden bullets with the heavy spring work like a charm. I had a P22 and a my mosquito at the range with me yesterday shooting them side by side using three types of ammo.

The mosquito liked the Remington golden bullets and the Remington subsonic. It would not cycle the Blazers.

The P22 liked the blazers and the Remington golds but would not cycle the subsonic.

Both guns are fun to shoot but I prefer the mosquito because it feels like a real gun. The P22 feels like a toy. I have other hand guns I take with me to the range, but for simple target acquisition and trigger practice you can’t beat the mosquito.

I’ll admit the trigger could be better. When I compare it to my 50 year old mark I it’s really bad. But once you get use to a 15 mile take up in single action shooting it isn’t that bad.

I still prefer it over the Walther. My buddy has a Walther and a Buckmark and he prefers the Walther. He says the Buckmark is a pain to breakdown and clean. My Sig is easier to breakdown and clean than the Walther.

I think many of the posters are expecting too much from a .22 plinker. That’s all they are.