BrickArms M23 Pistol w/LAM
Capable of making a 2 inch group at 50 yards, each round in the 12 round clip has considerable stopping power, and the Laser Aiming Module (LAM) allows for quick "red dot" accuracy.

Also available in a SOCOM tactical version.

$1
 
(Disclaimer: All BrickArms tiny toy weapons are made of solid ABS plastic, designed to be used with LEGO toys. They cannot shoot bullets and cannot be made to fire bullets in any way. Again, they are a TOY! T-O-Y Toyee!)