The Graco Gusmer D-Gun, AR-125/250, Gusmer C/D gun and Gama Star gun is ideal for small to mid-range output foam applications such as interior stud-wall spraying. A variety of mixing chamber sizes allows the operator to fine-tune the round spray pattern for virtually any application. Lightweight, easy to operate and maintain. Mechanically self-cleaning so you eliminate costly solvent-flushing.