Home > Magazine Upgrades >

14 Round Mosquito High Capacity Follower Upgrade

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


 
Alternative Views:


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.

PLEASE READ BEFORE PLACING YOUR ORDER
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
Qty:

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 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: 11 Write a review »

  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.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Upgrade mosquito magazine December 22, 2021
Reviewer: Timothy Jeffcoat from Orem, UT United States  
These magazines inserts fixed the issue I had with round’s jamming
Well worth the money

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 +4 more rounds in my Firefly October 26, 2021
Reviewer: Robert Thiery from Houston, TX United States  
As always the upgrade follower was easy to install and worked flawlessly on my new 3 mags. And now my slide locks open after last round. What a deal for $6.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 Excellent August 11, 2021
Reviewer: Alvaro from Miami  
Excellent

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 April 5, 2021
Reviewer: Anonymous Person from fallon, NV United States  
worked fine as intended

Was this review helpful to you?

View All Customer Reviews