The raiders liked nothing better than camping out near the Boonta Eve Classic Podrace track during a race and taking pot shots at the pods as they zoomed past. The rifles were similar to the Czerka produced 6-2Aug2 hunting rifle so it is possible that the raiders stole shipments of these weapons and modified them for their own use.
The weapons were normally modified with improved firing chambers for larger and more powerful slugs or the addition of scopes for better sniping.
The Tusken Raiders generally modified their rifles, as the basic variant lacked the targeting tools necessary to make the rifle an effective sniping weapon. A Tusken Raider taking aim at podracers in the Boonta Eve Classic.