In order to install and use the 45 ACP magazine extension certain parts of your CX4 will need to be modified. Please read these notes carefully before ordering a magazine extension kit so that you are fully aware of what is involved in modifying your CX4 before you order the parts.

This page details the modifications that require to be made to your gun. How these modifications are carried out can be viewed by following the links below.

• The most significant modification will need to be made to your original 45 ACP magazines. If you look at the magazines you will note that there is an elongated depression on both sides of the magazine near to the base plate. These depressions are designed to prevent the loading of more than 8 rounds into the original magazine and they must be removed in order to use the magazine extension. This modification permits use of the magazine with the magazine extension and it does not cause any problems with using the modified magazine in its original 8 round configuration when required. There will, of course, be two holes in the sides of the original magazine body that could permit dirt etc to get into the magazine. This should not be a problem while the magazine is in use since the holes are protected inside the gun's grip but there could be a problem with dirt ingress while the magazine is in the open. These mags look a little worn since they were used for product testing.

Proceed to the magazine modification instructions

• The second modification is also to an original magazine component. A small chamfer will need to be filed on the lower left-hand edge of the cartridge platform so that the original sharp corner does not snag during loading at the point where the original magazine body joins the extension body. This is a very simple modification and does not affect the normal operation of the magazine.

Proceed to the cartridge platform modification instructions

• The final modification is to the magazine adapter that fits inside the gun's grip. The ramp at the lower rear part of the adapter will need to be removed to permit the modified magazine to fully seat into the grip. The ramp does not really serve any useful function in routine use. Its purpose is to make the insertion of the magazine a little easier. This may be an important function with a hand-gun but it is not really a significant aid in the case of a long-gun.

Proceed to the adapter modification instructions