The Ramset VIPER4 .27 Caliber Strip Powder Tool allows you to work faster. Its heavy duty buffer system prevents front end damage caused by piston overdrive-especially through sprayed-on insulation. Completely redesigned open-ended muzzle keeps your tool cleaner longer. Simplified Barrel Retention Collar makes it so that no tools are required for assembly or disassembly. Compatible with the newly designed poles, the rear collar is connected by set-screw to avoid a manual tightness check.