Facility for Disabling Magazine Release of a Firearm

Abstract

A frame defines a magazine receptacle adapted to receive a removable magazine. The frame defines a first passage receiving a magazine release latch movable between a latched position and a released position. The frame defines a second passage intersecting the first passage and receiving an elongated block element movable between a blocking position in which the block element extends into the first passage to prevent movement of the magazine release latch to the released position, and an unblocked position in which the block element is clear of the first passage to enable movement of the magazine release latch to the released position. The second passage has an opening away from the first passage at a selected surface of the frame abutting a removable upper receiver. The block element protrudes from the selected surface when in the unblocked position to enable operation of the magazine release latch when the upper receiver is away from the frame, and the block element has a selected length adapted to block the latch element when the upper receiver abuts the frame.

The claimed invention is: 
     
         1 . A firearm comprising:
 A frame defining a magazine receptacle adapted to receive a removable magazine;   the frame defining a first passage receiving a magazine release latch movable between a latched position and a released position;   the frame defining a second passage intersecting the first passage and receiving an elongated block element movable between a blocking position in which the block element extends into the first passage to prevent movement of the magazine release latch to the released position, and an unblocked position in which the block element is clear of the first passage to enable movement of the magazine release latch to the released position;   the second passage having an opening away from the first passage at a selected surface of the frame abutting a removable upper receiver;   The block element protruding from the selected surface when in the unblocked position to enable operation of the magazine release latch when the upper receiver is away from the frame, and the block element having a selected length adapted to block the latch element when the upper receiver abuts the frame.