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14 Round Mosquito High Capacity Follower Upgrade

Sig mosquito | mosquito magazine | sig sauer mosquito | high capacity | magazine extension | high capacity magazine | 22lrupgrades

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With the HiCap +4 (Plus 4) follower you can turn your factory 10 round Sig Mosquito magazines into a 14 Round Magazine. With one (1) round in the chamber and 14 in the magazine, that's 15 in the gun! The shorter follower allows for more space in the magazine tube so that it will fit an additional four (4) rounds in the mag.

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.
This item CAN NOT be shipped to California

International Orders Click HERE

MSRP: $7.95
Our Price: $5.95
Savings: $2.00

Shipping: Usually Ships in 1 to 2 Business Days
Part #: 200-14RD-SMOS

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. NOTE: YOU WILL NOT USE THE METAL PIN WITH THE BLUE FOLLOWER

3) Remove factory follower.

4) Insert HiCap follower into the magazine body.

5) Insert magazine spring into magazine body with coils backwards (see photo).

6) Compress spring with retainer plate into magazine body and slide on the basepad.

Sig Sauer 22 Mosquito High Capacity Magazine
NicTaylor Plus4 Follower

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 15 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Unlocking new capacity for the Sig Mosquito! February 13, 2024
Reviewer: Keegan Guyer from San Antonio, TX United States  
The +4 follower worked as advertised, allowing 4 additional rounds into the magazine and fed flawlessly! I highly recommend these!

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  0 of 0 people found the following review helpful:
5 of 5 Mosquito upgrade. August 8, 2023
Reviewer: Heman Padgett from Craig, CO United States  
I really like my Sig Sauer Mosquito. The only minus for this little pistol is the 10 round capacity magazine. The good folks at Taylor Tactical solved the shortcoming brilliantly.  The upgrade for the magazine workes perfectly, took about 1 minute to install. Thanks for a perfect solution to an otherwise outstanding pistol.

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  0 of 0 people found the following review helpful:
5 of 5 14 Round Mosquito High Capacity Follower Upgrade July 16, 2023
Reviewer: Anonymous Person from Surprise, AZ United States  
Taylor Tactical Supply kept me in the loop the entire process from order to delivery.
That type of customer service is hard to find these days.  
The product I purchased works as described.
Will probably buy more from them when the need arises.

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  0 of 0 people found the following review helpful:
5 of 5 Great Product March 5, 2023
Reviewer: David from Litchfield Park, AZ United States  
It does exactly what it says it will do.  Extra capacity.  Super easy to swap the springs out.

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  0 of 0 people found the following review helpful:
5 of 5 Works as described May 17, 2022
Reviewer: Antonio V. from Austin, TX United States  
I've been using the older +4 follower, the ones that don't hold the slide open after the last shot, and have been happy with those.  I decided to upgrade the previous upgrade with these followers and so far they work as advertised and are reliable like the old followers.  Only thing that changed is now the slide stays open after last shot.

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