Home > Magazine Upgrades >

16 Round Mosquito High Capacity Magazine Upgrade
Mosquito +3 Black Aluminum Hi Capacity Magazine Basepad and HiViz Follower | magazine extension | high capacity | 22lrupgrades | magazine bumper

Alternative Views:

The Mosquito High Capacity Magazine Upgrade converts your factory 10 round magazine to a 16 round magazine! With a round in the chamber and 16 in the mag, that's 17 rounds in gun! The High Capacity Magazine Upgrade replaces the factory plastic basepad and factory follower with an aluminum basepad and High Capacity Follower. The basepad is also longer than the factory plastic basepad and allows for more positive seating of the magazine in the gun. Additionally the aluminum construction is more durable than factory plastic basepads making your magazine less prone to breakage upon dropping.

Choose whether or not you want your pistol to lock open on the last shot fired. The original magazine kits were sold with the Shockbottle follower THAT DOES NOT lock the slide open on last shot fired. The NicTaylor follower DOES lock the slide open on last shot fired but not like the factory magazine.

Since the button on the factory magazine is removed when installing these high capacity parts, the function of locking the slide open on the last shot fired is lost. That button on the side of the factory magazine is used to actuate the slide lock feature on the gun. The NicTaylor follower is designed to catch the slide itself and thus lock the slide back/open. This technique is used frequently on AR15 22lr conversion kits. However, when doing this the user looses the ability to drop the mag free since the magazine is essentially being stopped from falling free when the mag release is pressed. The user will either have to pull the magazine out or pull the slide back to its most rearward position and manually engage the slide lock. This will allow for the magazine to drop free. For best results when using the NicTaylor follower, we recommend reversing the direction of the magazine spring (see picture). This will help with more positive engagement of the follower and thus locking the slide back.

* NOTE that the GSG Firefly is a copy of the Sig Sauer 22lr Mosquito pistol. The parts on the Mosquito are interchangeable with the GSG Firefly. So no matter if you are buying Sig Mosquito parts or GSG Firefly parts, they will fit both guns.
International Orders Click HERE
MSRP: $30.95
Our Price: $24.95
Savings: $6.00

Shipping: Usually Ships in 1 to 2 Business Days


Installation Instructions RESTRICTIONS

1) Remove factory basepad and retainer plate.

2) Remove magazine spring and slide factory follower down to base of magazine so that the load assist pin can be removed from the follower.

3) Remove factory follower.

4) Insert HiCap follower into the magazine body.

5) Insert magazine spring into magazine body.

6) Compress spring into magazine body and slide on the aluminum basepad. Assure that the spring is in the pocket of the basepad.

7) Finger tighten set screw with the included hex wrench.

Sig Sauer 22 Mosquito High Capacity Magazine
NicTaylor Plus4 Follower

Average Rating: Average Rating: 4.5 of 5 4.5 of 5 Total Reviews: 17 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 addded capacity to the mosiquto June 28, 2021
Reviewer: Happy Shooter AZ from , Arizona  
Installed easy enough and worked as advertised. Gonna order a couple more. I installed into a firefly mag not the factory sig since just had the 2 and wanted to leave them alone. I have 6 aftermarket mag and the one with the Taylor Tactical high capacity runs just as good if not better than a couple. Thanks guys makes plinking  all that much more fun.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 16 Rnd GSG Firefly upgrade w/last round lock open June 1, 2021
Reviewer: German Turayev from Waterford, MI United States  
Exactly as advertised, works flawlessly. Thanks.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 May 18, 2021
Reviewer: J P from NC  
Works great

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 Excellent!!! April 30, 2021
Reviewer: Julian  
This is a excellent addition to my mosquito. Works as advertised. Thank you!

Was this review helpful to you?

  0 of 0 people found the following review helpful:
5 of 5 FANTASTIC CONVERSION KIT!!! March 13, 2021
Reviewer: Jay Andre from COLBERT, GA United States  
As I said in the subject title: This is a fantastic conversion kit. I bought it at a good time!! With the price of .223/5.56 ammo a dollar a round or more, it's nice to be able to shoot the ''less expensive .22lr. It has worked flawless for me. I also bought the McFadden speed loader, not only to load the 25 round magazines, but also to load the 50 round drum magazine from Black Dog Machine LLC. This conversion kit is the one & only one to buy!! Don't waste your time & money on anything else!! It is a joy to own!!

Was this review helpful to you?

View All Customer Reviews