5 Most Common Sig Mosquito Problems And How To Fix Them

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I’ve had hands-on experience with the SIG mosquito. Quite an adventure, huh? From the sleek design to its fascinating features, there’s no doubt this is an extraordinary firearm. But let’s be honest. I’ve run into some bumps along the road, and I believe sharing these with you is crucial.

Now, I’ve noticed a few common problems cropping up. They range from failure to feed and eject and extractor woes to even trigger and safety issues. And oh boy, don’t get me started on the magazine catch! 

However, don’t worry. I’ve grappled with these Sig Mosquito Problems head-on and are here to share what we’ve learned. I’ll provide clear, no-nonsense solutions to the most common problems the SIG mosquito faces.

Table of Sig Mosquito Problems

ProblemsShort Solutions
Trigger ProblemsRegular cleaning and maintenance of the trigger
Failure to FeedUse preferred ammo types and keep the gun well lubricated
Safety IssuesGet professional help from SIG if necessary
Problems with the MagazineTry locking the slide and pulling the magazine; consider replacement if needed
Failure to ExtractTry brief stroking or consider lighter spring

Top 5 Sig Sauer Mosquito Problems & Solutions

1. Trigger Problems

Well, who’d have thought? A superb firearm like the SIG Mosquito can sometimes give you a bit of a hard time, particularly when it comes to the trigger. 

From my hands-on experience, I’ve found that the trigger can sometimes be somewhat stubborn. And, if you’re anything like me, a stubborn trigger can put a damper on your shooting experience. But don’t sweat it; I’ve got your back.


So, how do you deal with a rebellious trigger? Simple – you show it who’s boss! Okay, it’s not that dramatic, but hear me out. 

The key here is to ensure your firearm is always well-maintained. I’mtelling you that regular cleaning of the trigger mechanism can work wonders! Use a high-quality gun solvent to clean up any grit that may be causing the resistance. 

But remember, always handle it with care. Too much force can cause more harm than good. And remember, sometimes, it just takes a bit of patience and some good ol’ TLC.

2. Failure To Feed

Let’s talk about another common issue – the dreaded “failure to feed.” Man, this is frustrating. 

You’re all geared up, ready to have a great shooting session, and then bam! Your SIG mosquito just won’t pick up the ammo you feed it. 

I’ve even experienced situations where the slide sticks halfway open, not quite ready to welcome a new round.


So, how do I fix this little dilemma? Well, from my experience, the SIG mosquito seems to prefer certain types of ammo. i’ve had smoother experiences with CCI Stinger ammo, for instance. 

Plus, keeping your firearm well lubricated – I recommend Rem Oil – is vital. As for the magazine, switch to metal. 

The plastic ones may cause you unnecessary headaches. Remember, a quick call to SIG can set you right if all else fails. Trust me; I’ve been there, done that!

3. Safety Issues

Safety first, right? Well, it’s a mantra I take seriously. And that’s why when I faced some issues with the safety lever on the SIG mosquito, I felt the need to bring it up.

No matter which position it’s in, it’s like it’s just not doing its job. And sometimes, simply inserting the clip might cause the slide to close automatically – talk about a shocker! Even the de-cocking lever sometimes just refuses to send the hammer forward.


Okay, so how do you tackle these safety issues? First off, if the slide’s closing unexpectedly, that’s serious. 

My advice? Send it to SIG. It’s a job for the pros. 

Also, remember the safety lever’s main task is to stop the firing pin from firing a cartridge. Dry firing is a big no-no, particularly with rimfires. 

4. Problems with the Magazine

Ah, the old slippery magazine issue. Yes, I’ve been there too! You load a fresh magazine; you’re all set, and then, as soon as you rack the slide to chamber a round – whoosh! – the magazine starts playing with you.

Quite a bummer, isn’t it? I’ve even found metal shavings in the magazine catch – talk about a mystery needing a solution!


Well, I tried a simple trick. Lock the slide to the rear, insert the magazine, and give it a good tug. If it doesn’t lock, you’re probably dealing with a faulty or defective magazine release. 

No luck there? It might be time for some replacement parts. SIG might’ve discontinued them, but you can still get them from German Sport Guns under the FireFly name. 

5. Failure To Extract

Let’s get into another hiccup, the “failure to extract” issue. So you’ve got your SIG mosquito, you’re on the field, and the extractor doesn’t seem to want to play nice.

It doesn’t fully move down into the slot designed for it and refuses to pull certain ammo types, like the Remington GBs. It’s as if the extractor drops them before reaching the ejector.


Now onto the good part, the fix. I’ve found that brief stroking might do the trick if the springs are really powerful. But that might not always work. 

Especially with high-velocity ammo like Stingers and Vipers, things can get too hot for the extractor to cycle smoothly. And a lighter spring? Well, it’s hit or miss. Just sharing my two cents here!


The SIG Mosquito is one incredible firearm. It’s got the looks, the features, and that irresistible taste of adventure every firearm enthusiast craves. 

But, like most things in life, it’s not perfect. From stubborn triggers to slippery magazines, I’ve battled a fair share of its issues. 

But let’s not forget every problem comes with a solution. It required a bit of patience, some elbow grease, and a dash of ingenuity. 

So, yes, it has its challenges, but aren’t those what makes the journey worthwhile? I’ve certainly enjoyed my hands-on experience with the SIG Mosquito, bumps and all. I hope my insights help you make the most of yours!


Is the Sig Sauer Mosquito discontinued?

Yes, the Sig Sauer Mosquito is indeed discontinued, which might make finding replacement parts or magazines a challenge.

What model is a sig mosquito?

The SIG Sauer Mosquito is a .22 target pistol. It’s based on the SIG Sauer P226 but is only 90% of its size. It’s a blowback operated pistol.

Where is the Sig Sauer mosquito made?

The Sig Sauer Mosquito is made in Germany.

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I'm Micheal, an avid shooter and hunting enthusiast from Texas. I'm a recreational shooter who loves to spend time at the range and enjoy learning about new firearms and gears. I love to write about guns and share my passion for shooting with others.

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