The Byrna SD and SD XL models are the successors to Byrna HD / HD XL models and have been re-engineered for optimal performance which include upgraded sights, a honeycomb grip and a modified straight trigger.
a three-blade sight,
rubber honeycomb grip for better grip retention, even when wet,
an external ambidextrous safety lever that can easily be switched between safe and fire mode,
a breech indicator at the top which not only indicates a projectile in the chamber but allows the projectile to be ejected ensuring the launcher is clear,
standard Picatinny rail for mounting of accessories.
The body is manufactured from glass filled nylon polymer and designed with similarities of a semi-automatic pistol. The projectiles are fed into the Byrna SD / XL by utilising interchangeable 5-round and optional 7-round magazines.