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Introducing the new Hadron Airsoft Designs Mk 23 "Saviour" magazine retention system.

As much as we love the Mk23, there has always been one issue which plagues all users, new and old.

Loosing magazines.

We used tape, elastic, velcro, rubber bands, anything to stop us accidentally dropping magazines.

The days of adding these crude but effective modifications are over.

The Hadron Airsoft Designs "Saviour" system replaces the standard single lever action catch, with two slimline independently acting, sprung catches.

This means, in order to eject a magazine, both levers need to be activated, simultaneously.

We also changed the direction of the activation, so the catches are are also pulled into the grip, rather than pushed down.

This addition of the Saviour system to your Mk23, greatly reduces, if not eliminates, the dreaded Mk23 magazine loss in game..


The new Hadron Airsoft Designs "Saviour" magazine retention system..

Saving your mags, and adding confidence to the users of the Mk23 platform.


Compatability:- Mk23 ASG, STI, TM SSX23, SSX303

Spec:- CNC aluminium bodied catches designed by Hadron Airsoft Designs Slimline contoured ergonomic design, perfectly matches the Mk23 form.

Black Anodised finish, can be camouflaged easily if required by the user.

Stainless matched springs used for operation. (Spares available)

Tools:- Small hammer 2mm to 3mm Pin punch (blunt screwdriver, or allen key could suffice) Small flat blade screwdriver Lubricating oil (as required)

Instructions:- Ensure no BB are in the pistol, or magazine

Remove the magazine from the pistol

Use a 2mm to 3mm pin punch to tap out the existing catch pivot pin, and set aside

Remove the existing catch and spring. Store these safely.

Unpack the new Hadron Airsoft Designs "Saviour" magazine system Check there is a LEFT and RIGHT catch (mirror images), and 2 x springs.

Place the LEFT and RIGHT catches with the spring holes facing upwards, and the pivot pin holes aligned

Insert one spring into each upward facing hole (1 in each) If required, add some lubrication to the pivot pin holes, and between the two Saviour catches.

Insert one catch at a time, into the Mk23 lower release lever cavity, taking care not to damage the springs.


Insert both levers and springs together as one unit.

In both methods, the springs may need to be pushed into location with a small flat blade screwdriver, or feeler gauge.

Check the alignment of the Saviour catches with the Mk23 pivot pin hole, and insert the pin carefully.


Check the operation of the catches. Each one should move smoothly, and return to original position.

Check both Saviour catches action, as the magazine is pushed home.

Insert a magazine to test action (no BB to be used during testing)

Check both Saviour catches have to be pressed to release a magazine.

Check activating 1 catch only does not release a magazine, then repeat with the other magazine.

Tests complete.


Please Note

When buying parts from Longbow BB Ltd, you confirm you have the required ability to install and tech your airsoft replica as required. 

Longbow BB Ltd do offer a paid for service option for us to look at your rifle and try to solve any issues you maybe having. 

We need to manage your expectations as we (Longbow BB Ltd) are unable to provide extensive hours of tech advice for parts purchased that have been installed by yourself. 

All parts are inspected before dispatch to ensure product quality.

Hadron Airsoft Designs "Saviour" magazine retention system

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