Cartridge counter

1. An ammunition clip for an automatic and/or semiautomatic firearm, the ammunition clip comprising:

a rounds counter;

a frame with an ammunition push mechanism housed inside the frame;

wherein the ammunition push mechanism is movable by a first spring between a base at one end of the frame and an entry/exit hole for ammunition rounds at another end of the frame;

wherein the rounds counter includes distance detection means that measures a distance between the ammunition push mechanism and the base of the frame;

wherein the distance detection means includes a variable linear magnetoresistance element and a movable permanent magnet secured to the ammunition push mechanism so that a distance between the ammunition push tile and the base is calculated by a magnetoresistance; and

wherein the variable linear magnetoresistance is located in the firearm handle.

2. A clip in accordance with claim 1 ; wherein the magnetoresistance element is a magnetic transducer.

3. A clip in accordance with claim 2 ; wherein the magnetic transducer is analog.

4. A clip in accordance with claim 3 ; wherein the clip is made of a paramagnetic material.

5. A clip in accordance with claim 3 ; wherein the frame includes a rectangular slot facing the magnetic transducer.

6. A clip in accordance with claim 1 , wherein the clip includes a first set of electrical terminals located outside a clip casing.

7. A clip in accordance with claim 6 , wherein the clip first set of electrical terminals is located near the entry/exit hole of the frame.

8. A clip in accordance with claim 6 , wherein the first set of electrical terminals is located at the base of the frame.

9. A clip in accordance with claim 1 , wherein the clip is of a box type.

10. An ammunition clip for a firearm, the ammunition clip comprising:

a frame having an open end through which rounds are loaded and unloaded, and a base;

an ammunition push mechanism housed inside the frame;

the ammunition push mechanism including:

an ammunition push tile movable between a first position near the open end of the frame and a second position near the base of the frame;

a movable permanent magnet secured to the ammunition push tile to move with the ammunition push tile between the first position and the second position to produce a variable linear magnetoresistance; and

a spring between the base of the frame and the ammunition push tile to bias the ammunition push tile toward the first position;

and distance detection means that measures a distance between the ammunition push tile and the base of the frame by measuring the variable linear magnetoresistance produced by the permanent magnet.