DLT-20A

The DLT-20A was a blaster rifle manufactured by BlasTech Industries during the Galactic Civil War. This weapon was commonly used by the stormtroopers of the Galactic Empire.
The BlasTech DLT-20A blaster rifle was a long-barrelled rifle (and sometimes referred to as the 'Longbarrel rifle') with a top-mounted rangefinder and electronic sight. This was one of the few blaster models produced with a magnatomic adhesion grip, keeping the weapon firmly in the wielder's grip.
The DLT-20A was similar in design to the BlasTech A-280 blaster rifle and the E-17D sniper rifle favored by the Rebel Alliance.
The murderous droid, IG-88, uses this weapon.