Owners of any one of the variety of Zentico PT-1 replica stocks may find that occasionally they become loose or will no longer lock in place when extended out. Sometimes this is the result of a part moving out of alignment, but more often it is simply installation error from the manufacturer.

Fortunately this is very easy to fix and you needn’t worry about having to fork out another $150 for a replacement stock.

The only tools you will need are a small flat blade screwdriver, a 3mm allen key and a small punch.

Step 1

First, release your locking latch and align the retractable portion of the stock up until you can see the flat blade screw through the hole found on the left side of the stock:

Remove this screw and you will be able to slide the stock completely apart.

Step 2

On the right side of the stock, proceed by removing the cheek riser which is held in place with three allen head screws.

Step 3

After removing the cheek riser, you will have direct access to the stock latch mechanism. The latch is held in place with a single pin that is pressed out from the left to the right. Of note, the cheek riser actually holds the latch pin captive.

In this example, this Zenimei PT-1 stock would not lock solidly in any of the extended positions. The underlying reason for this would be that the flat spring underneath the latch was incorrectly installed.

The flat spring has a u-shaped notch on one end and this is supposed to index on the top of the magnet as follows:

The spring itself is supposed to have an arch to it. However, in some cases the spring may be overly compressed and lay too flat. This may cause it to drift out of position again, even after installing it in the correct location. To remedy this, simply bend it with your fingers till you obtain the desired result.

Step 4

After adjusting the spring and ensuring it is installed correctly, you can then reassemble in reverse order. The one thing I would suggest is to add some Loctite to the flat blade retainer screw when you are finished. This screw technically acts as a stop to prevent the stock from sliding completely off.