Patent ID: 8601733
Filing Date: 2013-12-10
Classification: F41A

Abstract:
1. A magazine add-on attachable to a magazine, the magazine add-on comprising: a housing attachable to a bottom of the magazine as an add-on and having a spring-loaded follower, the housing having a window; a platelet arranged to replace a bottom platelet of the magazine, the platelet comprising a connector connectable to the spring and an aperture; and a coiled elastic strap having an inner end fixated within the housing and an outer end stretching through the aperture, the coiled elastic strap arranged to measure a distance between the follower and a point in the housing, wherein the coiled elastic strap comprises numbers on a side thereof that faces the window from inside the housing, the numbers increasing towards the inner end; wherein the outer end of the strap is arranged to move together with the follower to uncoil the coiled strap and display higher numbers in front of the window upon an upward motion of the follower, and to allow the coiled strap elastically re-coil and display lower numbers in front of the window upon a downward motion of the follower; and wherein the magazine add-on is arranged to be added on to the magazine and display the number of bullets left in the magazine.