SIG Sauer Mosquito Semi Automatic Pistol .22 LR 3.9" Barrel 10 Round Capacity Polymer Grip Blued Finish MOS-22B
ImportantPlease Note
We're sorry, but this product is no longer available.

Please click here to be notified by email if this product becomes available.
Brand: SIG Sauer MOS22B
Item: 50931
UPC: 798681303496

In the world of combat tested and approved firearms SIG Sauer is among the top of any short list. SIG Sauer firearms are used by law enforcement, military elite military units, and lawful citizens with concealed handgun permits. If you are not familiar with SIG Sauer the next logical question is where have you been? Since 1853 SIG Sauer has been providing shooters with firearms with the unquestionable reliability and durability they demand. After all SIG Sauer was born for defense with German precision and attention to detail.

The hottest pistol offering from SIG Sauer is the SIG Sauer Mosquito. Featuring a polymer frame chambered in .22 LR, the Mosquito is 90% the size of a P226 and the ideal choice for hours of shooting fun. The Mosquito features a wear-resistant polymer frame outfitted with an integrated accessory rail. The slide features adjustable sights, and along with the rugged blowback system, fixed barrel and superior ergonomic grip, the SIG Sauer Mosquito delivers traditional SIG Sauer accuracy. Additional safeties include an internal locking device and slide mounted ambidextrous safety.

Specifications and Features:
Item Number: MOS-22-B
Caliber: .22 LR
Action Type: DA/SA
Overall Length: 7.2"
Overall Height: 5.3"
Overall Width: 1.5"
Barrel Length: 3.9"
Sight Radius: 5.5"
Weight with Magazine: 24.6 oz
Magazine Capacity: 10 Rounds
Sights: Adjustable Rear
Grips: Black Polymer
Frame Finish: Black Polymer
Slide Finish: Blued
Features: Wear-resistant polymer frame outfitted with an integrated accessory rail

Firearms are only available online.

All firearm sales are final. NO RETURNS.

Return to manufacturer for warranty service.

Actual buyer must pick up from FFL dealer who will conduct the background check.

Firearm transfer must be the actual transferee/buyer. Click here to see BATFE form- Firearm Transaction Record Part 1.

Have Questions?

Use our Live Chat feature for immediate answers.

Can we ship this to you?


Here's What Others Bought After Viewing This Item

Customer Reviews

Most Helpful Customer Reviews

0 of 0 people found the following review helpful
4.0 Rating Love & Hate - 1/26/2011
Reviewer: Shooter McGavin
I love this little pistol and I hate it. Pros: Looks and feels like a larger caliber compact pistol. Awesome feel to it and great construction. Great balance and weight. Trigger pull is a little long, but it conditions your fingers better. It has a flip lever safety ambidextrous on either side of the slide. Easy to dissemble and clean. Pictanny rail for laser or light. Cons: Out of the box it is the most picky little shooter ever. New I tried every possible .22lr round I could find; Federal(Super cheap hi-velocity),Hyper-velocity, Federal Match(White box, black lettering), CCI(Mini mags, maxi, standard, pistol match), Remington(Gold), Remington Target and they all jammed or did not feed right. The CCI did ok, but still about 1 every 10 rounds. The Federal Match seemed to only have a issue 1 out of every two magazines, or slightly less. I tried both springs that came with it, the light spring seemed to work better than the heavy even though they say use the heavy for hi-vel. I tried leaving the pistol stored for a week with the heavy spring and the slide locked back, no luck there. I also put about 500 rounds of the cheap stuff through it before I went back to CCI and the Federal Match, still jamming issues, a little better but the Federal still jammed about 1 out of every 2.5 magazines. I cleaned it every 4 magazines as well. Finally I broke down and sanded and polished the feed ramp after trying everything, and anything anyone suggested; as well as Sig's website suggestions for troubleshooting the Mosquito. Now I can feed it the cheapest stuff with no issues feeding at all, but jams every couple mags ejecting one(quick charge of the slide fixes it). I still clean it after every time I shoot. I really wish this was a reliable pistol, I tried everything and really, really ironed it out putting hundreds if not thousands of rounds through it hoping it would work itself. I wish I could be head over heels for this pistol. I love all there rifles cause they are awesome, the .22 rifles I have never ever jam once, even if you do not clean them. To be fair 22 ammo is cheaply made, and I have also heard any of the other standard sized 22lr pistols all have issues jamming like the Walther.(No personal experience). I still really like this pistol, but I have seen others at this point just get rid of it. In conclusion I will keep it and use it for tactical shooting drills(A jam or two should keep me on my toes), but I would not expect this pistol to work in a crunch. (not that you would ever use a 22lr for defense as primary)
Was this review helpful to you? 

Purchasing a Firearm Online

Buying a Firearm Online is Easy!
  • Add your selected firearm(s) to your shopping cart and check out.
  • Select a local Federal Firearms Licensed (FFL) Dealer that will accept the firearm and complete the transfer. Find a FFL Dealer HERE.
  • If you choose an FFL Dealer that is not on our preferred list, you or your FFL Dealer will be required to fax or email us a signed copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number.
  • Pick up your firearm from the FFL Dealer, who will need to do a background check. Transfer fees may apply.
Buying Firearms on the Internet
Federal law requires firearms to be shipped to FFL Dealers. For an individual to receive a firearm from Cheaper Than Dirt! it must be shipped to an FFL Dealer in your state.

Locating a Federal-Firearm License Dealer (FFL) in Your Area
There are thousands of FFL Dealers in the United States. You may choose an FFL Dealer from our preferred listing or you may find a dealer in your area. To find a list of FFL Dealers in your area area CLICK HERE. If you choose a dealer that is not on our preferred list, either you or the FFL Dealer will be required to submit a copy of the Federal Firearms License referencing your Cheaper Than Dirt! order number. The FFL Dealer will usually charge a fee to conduct the transfer. There are duties that the FFL Dealer is required to do during the process which include a background check. Remember, the FFL Dealer is doing you a favor and the process takes time to complete. Fees can vary so check with the FFL Dealer ahead of time to request a quote on the fees associated with your firearm transfer. The FFL Dealer is in business to make a profit and your internet purchase may be viewed as competition to their retail business. If you feel the fees are too high, you can search for another FFL Dealer.

Completing the Transaction
Once you place the firearm in your cart and checkout you will receive a confirmation email that has your order number and further instructions. We will verify the FFL license and also make the FFL Dealer aware that an order from Cheaper Than Dirt! will soon be arriving for you. Most orders are processed within 2-3 business days from the time we receive and verify the FFL Dealers information. Once shipped, your firearm will arrive at the FFL Dealer within 3-7 days business days. The FFL Dealer will begin processing the shipment. It may be an additional day or so before the FFL Dealer is ready to conduct the transfer of the firearm to you. Call the FFL Dealer and set an appointment to confirm that the firearm is ready to be transferred.

Please note! All Firearm Sales are Final
It is important to thoroughly inspect your firearm before completion of the transfer. Once the firearm is transferred into your name, Cheaper Than Dirt! will not accept a return or exchange under any circumstance. If a defect is discovered after completing the transfer, you must contact the manufacturer directly for repair or replacement.

Terms of Use | Privacy Policy | © 2015 Copyright, entire contents by CTD, Inc.
Cheaper Than Dirt is a registered trademark of Direct Investments, Ltd. All Rights Reserved
This website is best viewed with Internet Explorer 8.0 and Firefox 15.0 with a screen resolution of 1024 x 768 or higher.
SIG Sauer Mosquito Semi Automatic Pistol .22 LR 3.9 Barrel 10 Round Capacity Polymer Grip Blued Finish MOS-22B
SIG Sauer Mosquito Semi Automatic Pistol .22 LR 3.9 Barrel 10 Round Capacity Polymer Grip Blued Finish MOS-22B
Sign In
New Customer? - Create an Account
Shopping Cart Summary
Cheaper Than Dirt - Close Shopping Cart