The DLT-20A - also called DLT20A sniper rifle, longblaster or pulse cannon - was a long-range blaster rifle manufactured by BlasTech Industries

BlasTech Industries Organization Manufacturers

sometime before the Galactic Civil War

Galactic Civil War Event Galactic Civil War

.
The DLT-20A had a top-mounted rangefinder and electronic sight. It had automatic and semiautomatic settings and a rate of fire very close to that of the DC-15A blaster rifle and other longblasters. This was one of the few blaster models produced with a magnatomic adhesion grip, keeping the weapon firmly in the wielder's grip and making them more difficult to disarm. With additional collimating rings and longer conduits of galven circuitry, these rifles have improved consistency in their shots.
The DLT-20A required a power pack, which could hold 30 shots.
The DLT-20A was similar in design to the BlasTech A295 blaster

Blastech A295 Blaster Rifle Weapon Blaster rifles

rifle and the E-17d sniper rifle favored by the Rebel Alliance

Rebel Alliance Organization Rebel Alliance

.